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How to move (ICSDroid) Calendars to the Phone section
This questions splits this question into smaller parts. Living without Google
So first of all I would like to find out, how I can move the 2 ICSDroid calendars to the Phone section. I think with doing this the read-only issue will be solved, too.

After adding 2 .ics files (click image to enlarge)
Feel free to post also alternatives to ICSDroid if there is something better. It does not have to be ICSDroid for the import.

Hm, sticking to your XY problem, are you? Your first line seems to approve my suspicion. OK, let me give you a pointer to check with: Android without Google is a blog series of mine, covering calendar/contact sync as well. To your convenience, these articles are not only available in English, but in German as well ;)

Not really XY problem ;) And sure with owncloud it would work. But I really liked the idea to go without. But I see that there is no way for this right now. So I gonna setup an Owncloud server now. But maybe someone still has an idea in the future.

Mustn't necessarily be owCloud (though it has its added values). If you're just after contacts & calendars, there's also Baïkal as plain DAV server, and some other lightweight variants like Radicale. See our sister site: Simple self-hosted sync system for Android contacts and calendar events

I now solved with installing ownCloud on my server. It was not difficult and is easy to setup. Also it gives the possibility to enable even more features.
So in Thunderbird I just add the online calendar URL to the specific calendar. That's it. The only bad thing is that Thunderbird(Lightning) does not get the colors from the server. So you have to set them manually.
And on Android you need a special app like CalDAV which is really cheap and as well easy to setup.
Now you can use any calendar app like the of your Android. Planner Plus or aCalendar. This is totally up to you. I really like Planner Plus somehow.
For me this is a really good solution. Synching is working perfectly even with different users on it at the same time. You can also manage the rights the users have in your ownCloud which was impossible with the row ics Dropbox solution.
I also use the Tasks app of ownCloud, what is called the app OpenTasks under Android, which makes it pretty easy also to use tasks on Android.


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How to decrypt the corrupt SD card formatted as internal storage?
So I'm on Marshmallow and have formatted my SD card as internal storage. Its filesystem got corrupt two weeks later for some reason.
Plugging it to GParted, I see 16MB of FAT32 and the rest is an unrecognized filesystem. It's not unformatted, just unrecognized.
GParted is giving the "Unable to read the contents of the fileystem." error for both partitions, though the FAT32 partition is accessible from File Browser flawlessly.
It's a Samsung i9505 running on nightly built Cyanogenmod 13.
EDIT: I found out the unrecognized partitions is a static AES-128 bit encrypted ext4. Now I will try to decrypt it and recover whatever.
EDIT2: I changed my mind and won't bother. Formatting as external storage this time.

How common is this?

How to decrypt Adopted Storage?

Even it does not fully answer the question, here's a guide to decrypt the external storage formatted as internal. You do need to be root on your phone, however.
The gist is that we search for strings including the keyword expand and ending with .key within vold using:
$ strings vold|grep -i expand
--change-name=0:android_expand
%s/expand_%s.key
/mnt/expand/%s

It returns a 16-byte key.
expand_8838e738a18746b6e435bb0d04c15ccd.key

Then you pass the key into this bad boy:
# dmsetup create crypt1 --table "0 `blockdev --getsize /dev/sdb2` crypt \
aes-cbc-essiv:sha256 00010203040506070809010a0b0c0d0e0f 0 /dev/sdb2 0"

And mount that in:
# mount -t ext4 /dev/mapper/crypt1 /mnt/1/
# cd /mnt/1
# find ./ -type d

Now you can cp everything elsewhere and hopefully save some data. Remember to exclude any key-related data (grep) when doing so, in case you want to reformat as ınternal again and put your stuff back in.

You can use hexdump -e '1/1 "%.2x"' expand_8838e738a18746b6e435bb0d04c15ccd.key to convert binary to hex.

Where exactly do you run those command?

@Royi You plug your SD card to a Linux computer.

To be exact, the expanded storage key of named expand_8838e738a18746b6e435bb0d04c15ccd.key (the actual hex number depends on your expanded storage device) needs to be fetched or read from the phone. The file is usually located in directory /data/misc/vold and the directory may contain multiple keys if multiple SD cards have been used. Note that you have to have root access to your phone to see the contents of the key files and extract the required encryption key.

source: Stack Exchange

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/

sort: votes


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Where can I download the original android stock ROM[made by Google, without any modifications or bloatwares]?
I own a Samsung Galaxy Note 3 (N900). I am fed up of the bloatwares that Samsung has added. Also I am unable to get an OTA update to Android 6. I want the pure Android experience on my smartphone. I don't know, if there are different ROMs for different devices; but I have grown tired of Samsung TouchWiz UI and I just want the super fast Android Marshmallow. I couldn't find any website links for obtaining these ROM's. Any help regarding how to obtain the pure Google android ROM and intsall it would be great.

Questions asking for ROM are off-topic at Android Enthusiasts.

The .kdz file you will flash to your phone includes everything in the phone: From system files to recovery, from kernel to libraries, everything. To flash a .kdz extention Stock ROM that is not specifically made for your phone will probably be the demise of your phone. Never fall for that mistake.
If you want to delete bloatware root your phone, and delete the app. You can do it with Titanium Backup. Very easy to use. But beware of what your delete for it might create problems in case of deleting something you shouldn't have deleted.

license: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/3.0/


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whatsApp - profile pic can't be seen last seen info can be
strange question here:
I can see someone's "last seen info" and there are 2 ticks when my message to that person is delivered but suddenly the profile picture is no longer seen by me.
Does it mean that person deleted my number from "my contacts" in her phone or just deleted her last profile pic and at the moment she hasn't got any to show.
we both have the last version of the application that is being run - in both cases - on iphone6

I don't know if this question can be answered correctly but I'll take my chances. We can't actually know any better than you would. One of the followings can be the case:

She might have deleted her profile picture.
She might have deleted you from her contacts (with her privacy settings for profile picture: My contacts or Nobody)
She might have changed her privacy settings for profile picture to Nobody

Thanks, but still - if I was deleted from "my contacts" - would I still be able to see "last seen" and "offline/online" info ?

@robot Depends. If the said person set their privacy settings to everyone then yes you would see them regardless of your existence in their "My contacts"

all_licenses: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/3.0/


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Swipe to wake when screen is off
I would like my new Android (5.0, Galaxy S5) to handle screen locking the way my old Android did (4.something, Galaxy Express).
The old one was set to pattern lock, but after the screen turned off, within 10 minutes I could unlock it with only a swipe. The new one is similar, but during the 10 minute interval, it doesn't require even a swipe--I just push the home button and it's immediately unlocked.
This is a problem because I keep pushing the button accidentally as I put it in my pocket, and the inside of my pocket touches the screen and does random things.
How can I make it require just a swipe, but not the pattern lock, during that time interval after the screen turns off?


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mount: mounting /dev/block/vold/179:98 on /data/sdext2 failed: Device or resource busy
When I open Link2SD, it asks to recreate mount scripts: I use ext4. After a reboot, when I open the linked application, it gets stuck and black screen till reboot.
I use ext4 as the 2nd partition, but it shows ext2 in Link2SD, and all my applications are now stuck.
mount: mounting /dev/block/vold/179:98 on /data/sdext2 failed: Device or resource busy

How to fix this?

Check with mount the mount points for /dev/block/vold/179:98. umount the according to mount points to free the device. Beware there could be damage if you interrupt a writing process.

If the 2nd partition is mounted by Android itself, then try to unmount it in the Android System settings. After that, create the mount script by Link2SD again.
That helped me, but after rebooting, I have to do it again.

all_licenses: Creative Commons - Attribution Share-Alike - https://creativecommons.org/licenses/by-sa/4.0/


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App's not installing after download complete?
I'm facing a problem while downloading apps.I have recently rooted my android which is Samsung galaxy tab 3 smt210r.But after a couple of days i am facing a problem that is when i download an app it does not install.it just disappears from the status bar after reaching 100%
I tried restarting my android,unistalling updates of google play,clearing cache of download manager,google play.but none of them seem to have solve the problem.
please help me as fast as you can.i can not even update any single app.

Possible duplicate of Apps download but do not install

Try to delete package folder of downloaded app manually, if exist from phone storage > Android > data
Reboot device again and download app again.
Hope it helps.

@Firelord  please check he have mention in his question that he already tried to clear data of Play store and download manager but problem persists that is why I asked him to try to delete downloaded app data manually if exist from  /data folder

Purely my mistake. I interpreted it otherwise.


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Importing/restoring contacts from HTC's .vef file on other devices
I have backed up my contacts from the HTC device, and I got the .vef file.
How to use the .vef file in Samsung mobile? I can't open the .vef file. Is it possible to convert .vef to .vcf? Or are any other methods available to convert the file?

Use vef file opener trial version

As far as I know you can use a .vef file to import contacts to your Google account using your PC. Open the contacts section of your Google account on a desktop browser and you'll see the import contacts option at the bottom of the left sidebar.
Once you've done that just sync your Google contacts on any of your Android devices and your contacts will appear. And in future make sure you save new contacts as a Google contact instead of on your phone memory, it makes things a lot easier.

Above solution importing to Google contacts does not work out. as google does not support this format. i have tried it.

I wonder why HTC used this unknown file format for exporting contacts. This file is not in textual format and is not viewable in text editors. I can confirm that above solution doesn't work, too.

This worked for me and only if you still have access to your HTC device: when exporting the contacts, you can choose not to encrypt them. The contacts are exported to a .vcf file then.


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Android ignoring "reply-to" header
When I receive an email on my Samsung S5 and reply to it, the email is going to the sender's email instead of the requested "reply-to" email.
I am using the default email app that comes with the phone...  On my older S4 phone, the emails were properly going to the "reply-to" address.
How do I reply to the "reply-to" address instead of the sender's?
Android™ version 5.0.2, Lollipop (G900PVPU3BOK4)

Did you ever resolve this problem?


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change notification sound for Google Keep
Is there a way/user settings which allows assigning a specific RING/Notification sound for Reminders in Google Keep application?
It seems like there is no Settings for this feature provided in the app itself.
My requirement is to have common ring tone for all reminders in Google Keep...No need for separate ring tone for each reminder.
Is this possible?

The UI is not clear in this case, but you can actually change this in the Android Application Notification settings for the Keep app.
(On Android 9): Go to Settings > Apps and Notifications > Keep notes > Notifications. Then you have to tap on each of the Notification Categories individually (e.g. Others, Reminders, Shared notes). As mentioned, from the UI it does not appear these Notification Categories are tappable but they are. You can then set various parameters for that Notification Category such as sound, notification dot, display behavior, ...
More info: How to use notification channels on Android Oreo


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How to tell when Google Play Store credit will expire?
For Google Play Store credit that does expire, how does one see when it expires?
For credits that do not expire, see this QA.

If you go to Google Wallet payment methods you can see your Google Play credit, how much has an expiry date and when it expires.

Thanks.  When I go to that page, it shows the balance, but does not indicate the expiration date for the credits that do have expiration dates.  Interesting that it works for you though.

@RockPaperLizard Just a thought but is it possible that it might be of doesn't expire kind?

@SarpSTA I wish that were the case, but Google stated that they do expire.  Unfortunately, I don't see any place within the Google apps / websites that indicate when credits expire.

@RockPaperLizard Weird. Call Google and ask them. They are really helpful.

@RockPaperLizard (855) 836-3987

@SarpSTA Unfortunately, after multiple calls to Google, I must say they are incompetent.  All they are able to do is tell me that they don't understand why their billing systems are not working correctly.  They can't fix their billing systems, and despite acknowledging the errors, have not been willing to correct the balance.  It's not the first time their system has stolen money.  I took screenshots, plus they say they can see the errors on their end.  They promised to fix the problem and write back, but they didn't.  It might be time to join the Goodbye Google club.

There is a new way to check if have any Google Play credit is about to expire.
Here is how to check:

Launch the Google Play store
Go to menu options and looking for Payment method option
Once you land on payment method option, you should be able to see more detail on your expire credit

I hope this helps, cheers.

Thank you!  I'll take a look.

FAQ says it expires 1year after the date of your most recently completed survey

To what survey are you referring?


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My IP address is wrong. How can I change it
I live in Iowa but my IP address is from another state. Why? I would like to change it to my area.

This is due to your cell carrier assigning random IP addresses to the phones connected on its network. It doesn't mean your IP address is wrong, it just means they don't have any available IP allocation available in your area.
The easiest thing you can do is connect to WiFi networks while browsing on the Internet, that will give websites a better idea of your location.
Installed Android apps do not care what your IP address is. If they need your location, they will use GPS to find your location (Google Maps does this). Websites won't use your GPS because that invades your privacy. They don't need to know your exact location, unless you want them to know (such as ordering off Amazon).
I hope this clears up the issue

Thank you very much for your help. I really appreciate it. Have a good day

@MelindaRohrer-Baldwin Glad to see Aaron was able to help you. If his answer solved your issue (which it IMHO did), please accept it (by ticking the little check-mark next to it). That way other users can recognize your question has a solution, even when seeing it in a list of questions. Thanks in advance!


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Lollipop - Apps not autostarting
I have Alcatel 5054D with Lollipop (5.1.1) on board. I noticed that some apps are not starting on boot or on events that are fired by the OS. For example, when my phone was not rooted I tried to install Truecaller, Truemessenger and Textra. They simply didn't work just after reboot or if I removed them from the recent apps list. What is worse SMS apps won't start on new incoming SMS, the message just disappears without any reaction from Textra or Truemessenger. But everything works fine when I start these apps manually and keep them in the background.
Then I rooted my phone, installed Link2SD and noticed that it fails to start after a reboot too! I have to launch it manually for the paths to be rebinded.
I installed autostarts manager and it showed that all the events (receivers) for these apps are enabled.
On the other hand standard SMS app, Whatsapp, Viber, GMail do autostart and work properly.
I have no task killers installed and cannot figure out the reason of the issue.

Could it be all the apps which are not working are installed on SD card – while those which do work are not?

No, they are installed in the phone memory.

OK, then it's something different. To get a clue (possibly at least), you could check the logs directly after/during a startup. Watch out for the "E" (errors) and "W" (warnings) lines especially.

I was mistaken when I wrote that I have no task killers. It happened so that Lollipop has a built-in task killer feature called "Limited apps" that limits app execution in background. For some strange reason all SMS apps become limited by default. The feature can be found in settings under Applications item.


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Lost then re-found phone
I lost my android, and while it was lost I did the factory reset from the device manager through google.  Since then, the phone has been found.  In the off chance that the factory reset did not go through, as the phone was offline or dead,is there any way I can undo this? Also, how annoying or difficult is it to re upload apps, music, etc after the factory reset?

Yes. You can do it easily.
First Make sure you didn't have any Sim Card inserted in your phone and go away from any possible wifi area (incase if you did turned on Wifi or Mobile Data).
Then simply remove your Google account through Android Settings and try to use another Google account. (this works for all case)
This can help you to get your phone being formatted.

does this mean that from now on, I will have to use the new google account on my phone?

basically yes. Google Didn't provided any help on that. To Minimize the risk, that will be the best option. Wait, Let me explore more in Help File of Android Device Manager.

I did explored all help files (it wasn't too vast enough, just 3 files) and there anre nothing mentioned about that.

Alright thank you! If I cannot avoid the factory reset on my LG G3, will this impact the phone negatively aside from deleting any downloaded apps, contacts, messages, etc?

You can first backup all your stuff while your original Google account is removed (see our backup tag-wiki for "ADB backups" and the questions linked at its end) – and also "dis-associate" the device from your account (via the Google Web interface, unauthorize it). Having everything backed up, setup your Google account again. If it now performs a factory-reset (which it might not, due to being disassociated/de-authorized), you can restore your data.

Damage on phone is negligible but you can backup the apps and other contents (be sure not to get connected to internet before it) and then the loss and damage will be zero except your couple of hours :D


text:
Is it possible to pull data in ADB sideload mode
My phone is locked, as explained here.
Since I can't find the password, I want to backup my data before a reset. I've just installed Android Studio and Samsung USB driver.

Boot my phone on "apply update from ADB" mode.
Open Windows CMD, run adb.exe devices
It list my device as sideload mode

How can I pull my data now??
Is there a way I can backup my data before a reset and without voiding the warranty??

No, in "sideload mode" you can only apply updates via adb sideload filename.zip, no other ADB commands are available, except adb devices of course.

Just had a similar problem. Look at this:
How-To Geek - How to Copy TWRP Android Backups to Your PC for Safe Keeping
In case you have TWRP installed or manage to somehow do so, then remember to take out the "Enable MTP" option in the "Mount" section of TWRP.

Don't even know what TWRP is.


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Is this phone compromised? Sending invisible SMS
Is there a way to take control of an android phone and to send SMS from it without the owner noticing?
Let me explain :
My niece (12yo) have been accused of sending insulting text message to several of her classmate over the last week but she denies it and there is no record of these SMS on her phone.
In doubt, I've seized her phone last friday to sort this out and it happened again yesterday but this time the phone was out of reach from her so i'm 100% sure she didn't do it.
Please note that :

I called my operator who confirmed that a SMS was sent yesterday.
I asked the kid to send me a screenshot of the sms he received to make sure he wasn't just lying.

Anyone knows what's going on here?

The device used by your niece must be having some apps (read: rogue) which have the permission android.permission.SEND_SMS. Try a permission checker app, such as this app  to filter out apps having permission to send an sms. If you're familiar with command-line, see my answer: http://android.stackexchange.com/a/123100/96277

Once you're done filtering them, post the result in your question and begin removing all of them (you won't be able to remove stock messaging app or any system app there), wait for some time and see if the issue persist. // The thing that is bugging me is that if it is a work of some random rogue app, then why does it send messages to the known contacts?

I installed a permission checker and the only apps with SEND_SMS where from the package "System".

Try another permission checker and compare the results of both. At least the default messaging app should've been listed in the results. Try my command-line method if the other app also shows the same result. And post the results using a screenshot.

Almost sounds as if someone is forwarding the SMS to your nieces phone. There wouldn't be any record of the SMS being sent, so it would give the impression that a rogue app is to blame. I tried to search out possible solutions, but I wasn't able to find a way to track/log forwarded SMS from another device. The best I can suggest is to contact the service carrier and explain it to them again. They should be able to let you know who is forwarding it to your nieces phone.

I don't have the phone at my disposal but i'll check all this this week-end. Sorry for the delay. Btw, since we gave her a new phone, the problem is gone but I'll check the old phone anyway to choose an answer ^^

Most definitely, non-system applications can send SMS messages, and then delete them from the history.  I use PushBullet all the time to send SMS messages using an app on my Windows desktop, via a corresponding app on my mobile phone.  See pushbullet.com.
On more recent versions of Android (you haven't said what you're running) non-standard apps have to be explicitly permitted to send SMS messages.  This permission can be enabled and disabled in the system settings.  Exactly where in the settings depends on the version of Android you're running.  On some systems, go to "Settings" -> "Networks" -> "More" and then find "Default messaging app" or "Defalt SMS app".
Also, "Device administrator" apps can get increased access to your system, which may include access to SMS.  Check "Device administrators" in the "Security" settings to see a list of apps, and to remove them if required.
Also, consider uninstalling any apps that you don't recognise, or even doing a factory reset.

Which Android version are you using? Ability to enable/disable a dangerous permission was officially added only in Android 6.0. However, there had been multiple stock ROMs in past shipped with some kind of privacy control available from Settings app.

The safest way is to reset the entire phone. Go to the phone settings and choose the option to set your entire phone on default settings and erase all data and apps.

This is a sound recommendation. If there's one prank or malware app on the phone, there are probably more.

Factory reset would not be able to solve the problem if there exists a system malware app. Let's see however if factory reset solves the problem for OP.


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How can I install a custom ROM on my Xperia S without unlocking the bootloader?
I have an old Xperia S and have rooted the device following the instructions here:
http://forum.xda-developers.com/showthread.php?t=2417672
From my research, people are saying that I don't need to have an unlocked bootloader to get a custom rom on the device but most guides are for devices with an unlocked bootloader (mine is not unlockable).
I have copied SimpleAOSP onto the storage card but not sure where to go from there as the phone wont boot into recovery mode (I think because the bootloader is locked). I've tried using FlashTool but am not getting anywhere.
Current Android version is 4.1.4. Build Number 6.2.81.96. I'd like to install SimpleAOSP from here:
http://forum.xda-developers.com/xperia-s/s-development/rom-unofficial-simpleaosp-l-xperia-s-t3105420

You need to have an unlocked bootloader to install a custom ROM.There are a lot of different way to unlock your bootloader. Simple search should do it.

You need a custom recovery installed and that's all to do here. You can either install that recovery by unlocking the bootloader and flashing the recovery partition from bootloader or by rooting the device (probably using a one-click root method) and flashing the recovery from within Android OS. I see that your device has an official TWRP recovery image. https://twrp.me/devices/sonyxperias.html

@ChristopherAngelo did you read the bit about how I cannot unlock the bootloader? It is locked by the carrier I think

@Firelord thanks. I tried TWRP via the play store and it said it had installed the recovery image but it cannot seem to restart the device in recovery mode (it reboots the phone but recovery seems to appear on the screen for a split second and then the phone boots as normal - back to 4.1.4).

DO NOT try to install custom rom without unlocking the bootloader. Lost my galaxy s2  because of that.

To install a custom rom you must have unlocked your bootloader. However for Sony phones, the process is a little more work. Sony has a website that provides IMEI code that you can use to unlock.
This is how you unlock the bootloader:
Simply go to the stock Sony dialer and type ##7378423## to access the service menu.
Tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked.
This link will provide further instructions to get the IMEI number:
http://developer.sonymobile.com/unlockbootloader/unlock-yourboot-loader/
I see that you already have downloaded the custom rom into the phone. Although when unlocking bootloader, the device storage will be wiped and factory reset. Make sure to do a backup of important files. (SD card remains untouched)
Have the custom rom on the computer for later transfer.
To install the custom rom, you must have a custom recovery; TWRP for instance.
After this process, you will be able to flash any custom rom of your choice.
Simply follow this tutorial to manually flash the TWRP recovery:
http://theunlockr.com/2013/02/14/how-to-install-twrp-recovery-on-the-sony-xperia-s/
After this part, the only thing remaining is to flash the custom rom. In TWRP, choose flash from storage and navigate to the rom file. Remember to wipe dalvik cache after flashing to get a stable boot. Note that first boot may take a while longer, so there is no need to worry.
Happy flashing!

We're looking for detailed answers here (if it gets lengthy, so be it but the answer must not be dependent on links. If that second link or the content behind it expires, your answer would be missing any useful info on flashing a custom recovery - the meat of the answer). Please see how do I write a good answer? and [edit] your answer to incorporate the required steps.


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Reset Google Play password
I forgot my son's password to filter which apps he download through the Google Play Store. How can I reset it?

Is it about Play Store parental control, or Google Play Store account?

Play Store is connected with your gmail/google account, you need to check by which account you use Google play Store and reset password for google/Gmail account as followed by Google instruction.
Hope it will help you.please Update me if any help you need.

The way Android Works is all the Google Services on the deivce by default run on a single gmail account,What I mean is your playstore gmail account is by default used with other google services like google play music google play games etc
if you want to reset your google play store password you need to reset your email password this will automatically logout of the playstore and ask you to sign in with a new password.


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su command not working, eventhough I am rooted
My problem is that my rooted android phone with Terminal Emulator app doesn't seem to be executing the 'su' command correctly.
I am trying to execute this command, after having executed the 'su' command:
busybox ifconfig eth0 hw ether 00:0a:95:9d:68:16

which returns this:
ifconfig: SIOCSIFHWADDR: Operation not permitted

I think this issue is caused by not having root rights, although I did execute 'su'. I noticed the '$' didn't change to a '#', that indicates you have root rights.
My Motorola Moto G first gen. is running Cyanogenmod with android 6.0.1
I enabled root for apps under developers options.
This is the guide I'm using: Spoofing MAC address. Some people encountered the same issue, but no solution was found.
Anyone know how to get root working on Terminal Emulator app? Any help is appreciated!
-pim

What does su -c 'id' return? Which CM build are you using?

It returns nothing at all.
Also I'm running an old nightly 13.0-20151215-NIGHTLY-falcon.
I don't want to update because I have to factory reset my phone for some reason.

It didn't work for me using Gboard (Google's Keyboard), so I tried Samsung's Keyboard (use the system's default keyboard) and it worked.

My device is a rooted Motorola Razr HD smartphone (also known as XT925) currently running Android 4.4.2 (stock ROM) with the Terminal Emulator app installed. In my case, all I have to do is to start Terminal Emulator and then execute this command:
su -

This causes me to become root and thus be able to execute any other command I want.


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Samsung Galaxy GT-P7510 won't charge
I have a Samsung Galaxy Tab GT-P7510/M32 32 GB. I can't get it to charge. I plugged charger in one time and showed the battery was empty and had a yellow triangle with exclamation point point in it. I tried a different charger and that didn't work either. It did power on and go off because of dead battery.

Have you tried a different USB cable? Is there anything printed on your current cable like 28AWG?

Basic things to check:

Is the charger broken? (try a different charger)
Is the charger the correct voltage and current for the phone? (check your phone specs and see if they match what's written on the charger, try a wall charger and a usb charger)
Is the battery broken? (try a different battery if you can find someone with the same tab)


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Any workarounds for Nexus 5X lags?
I'm one of those struggling with serious lags on my new Nexus 5X phone (Android 6.0.1). The issues are basically those outlined here on Reddit. I normally have ~500MB of free memory left out of 2GB with all my relevant apps up and running, so this shouldn't be a memory issue. To compare, my good old Nexus 5 has pretty much the same set of apps and works smoothly.
What I tried without much luck:

clearing the cache partition;
a factory reset;
flashing the latest factory image (MMB29P).

One thing that seems to be helping is turning on the Don't keep activities switch in the Developers options, then rebooting the phone:

So far, the lags seem to have improved, but I expect this to reduce the battery life.
Any other ideas/tricks to address this issue?

You shouldn't make this your own problem... Obviously their end. Anyway, was the problem gone when you first factory reset/flashed? Before you installed your apps again?

@AaronGillion, it indeed feels smooth after a factory reset and before installing any apps. Nevertheless I need those apps, and the same set of apps doesn't cause any lags on my older Nexus 5 with v6.0.1. I got read of all apps I don't regularly use already.

BTW, enabling Force GPU rendering seems to improve the lags as well. I'm yet to see if still it does it alone without Don't keep activities.

This seems like an app compatibility issue with Marshmallow. Your easiest solution is to email the app devs like crazy, or set up a scheduled email to those devs set for every day until they release an update.

My lag and freezes, too, have improved drastically with the Android 7 update. Bit strange that it took over a year to make my Nexus 5X actualily fun to use, but better late than never I guess.
However, I still think it's a hardware problem with some of the Nexus 5Xs, and better resource management in Nougat has sort of made the problem less palpable. But I would still say my Nexus 5 was generally snappier than the Nexus 5X.

It now sometimes have to do with the bad soldering on the motherboard that can lead to freezes and slowdowns, and eventually bootloops. Just look "nexus 5x lawsuit"  on Google and you see that there are even lawsuits for it now, as it is a common problem for the Nexus 5X

If your situation is improved by Don't keep activities, this is a strong indication that you are running poorly developed applications. The whole point of preserving applications in the background is to make full use of memory and reduce latency. If this increases latency, this means your applications are trying to do a lot of work in the background.
I would not expect battery life to be reduced by Don't keep activities, if the startup time of your applications is lower than the latency of keeping them around and switching. I would actually expect your battery life to improve by killing resource hogs immediately.
If you do not mind spending time diagnosing this, you should work on finding the culprit application(s). This may involve a substantial amount of testing combinations of applications. It may be that a particular combination of applications is creating contention for a resource that is handled differently on the Nexus 5X than on other devices. One application alone may not be the problem; it may be a bad interaction among a combination of applications that causes a major issue.
A less time intensive solution is probably a service like Greenify, described in How to prevent apps and processes from launching in background and slowing my device.
I have a Nexus 5X, and I do not any issues with interface latency. I also do not use many applications that are not stock.
In the past, I have had significant issues with latency resulting from filesystem TRIM on a Galaxy Nexus. With a recent explanation of when fstrim is scheduled to occur, I have modified my charging behavior to leave the phone plugged in and unused long enough for fstrim to run, and this helps quite a bit. I don't know, however, if the fstrim behavior for Marshmallow is the same.

I also had a problem with lag on the nexus 5x. The problem was the protection case. It seems the phone gets warm very quick while using a protection case and this causes the A57 cores to turn off. Using the phone without a case solved the problem. The phone now runs very smooth.

is there an app that notifies when cores turn off because of overheating?

Though I haven't used anything above lollipop (or Lemon Meringue Pie as someone may call it), there are some strategies for lagging on systems, which you can have a try.
The first is to install a toucher pro (sorry I don't have the links now), and use the clear memory utility inside it. It comes handy when you are working, but it might clear out some important activities. By the way, it is really small, with a size less than 10MB. I always use this util to make my phone quicker, especially on Ginger Bread.
The second is to use the back button long press. You can enable this option at the very end of Developer Option, and whenever you leaves a application, long press the back button to kill the app you were using. It seems to be useful too.
Anyway, though 2GB RAM is well enough, I think with a Marshmallow running, leaving 500MB is still too little. For my personal experience, leaving about half of the RAM is okay and normal.

The two main cores 4 and 5 are off or throtled to 633mhz by default in most cases on the Nexus 5x. I installed the Elemental X custom kernel over the stock rom and the cores stay on and the battery seems to last the same and performance seems back to factory new.


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Google Maps show location history where I've never even been
I have a Samsung Galaxy Core Prime and it has Google Maps downloaded on it as well as other Google apps. My husband went through my phone and in the Google Maps app, under timeline, apparently it showed that I had actually went to several places on days when I had never left the house, but the worse part is that it's saying I've been to places I've never even been.
This whole situation is frustrating because I love my husband very much but now he is completely convinced that I'm cheating on him, and I'm not; there has to be someone out there that can explain this total mess cause my husband doesn't believe a word I say.
Please help me figure this mess out and convince my husband that I'm not lying and in definitely not cheating!

Actually Google maps doesn't record your location from time to time, but Google Now does. Someone else might have been using the phone  if it's not you.

@MANI Actually, Google Maps does record your location.  You can see the tracking history at https://www.google.com/maps/timeline

I know you can go to Google.com/naps/timeline to see tracking history, that's why all this is so confusing cause we both went there and checked everything out but as I said e

@Micheleclark My original comment was in response to the other comment that said that Maps doesn't track you.

There are many possible reasons that places could show up inaccurately in the Google Maps tracking.

If your device is indoors, it will not have a good GPS signal (or possibly have no GPS signal at all) and will have to use less accurate location methods. Each of those methods has problems, some of which are discussed below.
If your device is trying to locate itself using WiFi networks (now called "WiFi Positioning System" or "WiPS" for short), it looks for nearby WiFi networks that Google knows about and then uses the locations that Google has on record for those networks as a way to determine your approximate location.  However, that means that if someone from a particular area moved into your area and Google has not updated their database, then Google's database will think that you are in the area where that person's WiFi network used to be.
If your device is trying to locate itself by searching for nearby cellphone towers, it could determine that it is anywhere in a large area in which those towers can be detected. The effective range of a cell phone tower could be anything between 1 and 45 miles, depending on how dense your area is.  That means that the numbers could be up to that far off if they only came from cell tower data.
Even if you do have a good GPS signal, Google will sometimes "snap" your location to a nearby "point of interest" if you drive by.  I don't know exactly how far away this snapping can happen, but I have seen it make some pretty bad guesses.

Here's one extreme example that I just read about: People keep going to this home looking for their lost phones and nobody knows why.
In the end, the fact is that the location-tracking systems available on consumer devices today are not that accurate.  I worked from home today because of the "Snowzilla" blizzard on the US East Coast, and left home twice to go to the library and run one errand, but my location history shows me being up to a mile further away from home than any of the locations which I visited. (I am actually working next door to a research group at the University of Maryland that is working on more-accurate location technologies, but it will be a while before any of them are on the market.)

Other than what @MosheKatz said in his answer another point you may have to consider is that whether your Google account is being used only on your Samsung Galaxy Core Prime.
I was surprised to see my timeline jumping across countries and quickly realised that my relative who has borrowed my Nexus tablet is producing these results. Being a close relative I did not mind handing over the tablet with my account in sync.
You try to sign out of all locations by visiting your Gmail account in a computer, then click on the Details link at the bottom right corner of the screen and then sign out from all web sessions by clicking a button that says so in the popup.
Also, you can visit Google Play Store account in a computer and click on the settings (a button with a cog wheel on top right). This opens up the devices in which your account is being used. If it list more than one phone/tablet then it confirms my assumption.
Additionally, explain your partner that to trust you more than the data/statistics or Google for that matter. All the best.

I've had the same experience. I saw my husbands timeline history on google maps and was accusing him of being places that google maps was showing in his location history. SO, I set up the app on my own phone and would check my timeline. To my surprise it also showed me being places that I never went and on days that I never left my house! Maybe have him set it up on his phone so that he can see you are telling him the truth.


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Controlling HDMI output scaling
Android does not have great deal of control over the hdmi scaling. What I'd like to do is do "centered, fit width" scaling. So in other words, on 1920x1200 tablet top and bottom has 60 pixels cut which results in 1080p output with no scaling.
Or as an another example, ipad resolution tablet would be scaled to 1920p width with some 500 pixels dropped.
Either way, full TV screen is used. How android does it is by scaling image smaller until it will fit the target resolution. With the ipad resolution that adds up to quite big black borders. And with netflix it's even worse as you get more black borders on top of it which you'd see on the tablet screen. Not pretty.
Now my Chinese tablet has Intel chipset which has some hdmi scaling options but sadly nothing that'd result in what I'd like to see. I also have an old nexus 10 which is used for netflix / HBO nordic duty. Nexus has no hdmi settings at all.
So is there any utility or system setting to control the hdmi scaling? I have root so editing system files is no problem.
My current solution is using second screen which can scale the tablet display to a different resolution, 1920x1080 in this case. It even does automated profile switching on hdmi connect. Sadly however it does not play nice with some apps, most notably swiftkey. Nova launcher is not fond of resolution changes on the fly either. Most annoyingly top menus are difficult to reach as the "swipe from top" function is confused by the inactive screen area.
So it works but it could be better.

Android seems pretty limited. I have a 5.1 tablet with HDMI out. The internal screen is 1920x1200 but the HDMI can run at 4K.    It has settings to adjust the scaling, but really no way to use the 4K resolution fully... it seems to depend on the resolution of the internal display.
The same tablet is dual boot to Windows 10 and on there you can set up dual monitors and use the full HDMI 4K output.  So it isn't a hardwarwe thing, it just seems the design of Android 5.1 that you can't use it in "HDMI only" mode or have it mirror independent resolutions.


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Infinix Hot 2 (X510) on Android 6.0 doesn't show names when receiving a call
My boss in the office asked me to help him upgrade his Infinix Hot 2 (X510) OS to Android 6.0 Marshmallow which I did. But after upgrading the phone, I discovered that when calls come in, it would only show the number but not the name.
How to fix it?

Seems a known issue: 1, 2

Based from Shelaf.com, you need to remove and re-add the Google Accounts and wait for them to resync.

Common Problems and Their Solutions
Problem 1: Contact not displaying names after making or receiving a call
Go to your Google Settings and remove all Google accounts. After some minutes, add them back and your problem should be fixed then.

The android marshmallow OS on the infinix hot 2 has quite a lot of bugs. In my opinion, the best option would be downgrading back to Android Lollipop. You can always choose to re-upgrade when the OS becomes more stable on the device.


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Why xmod doesn't work at bluestack?
I am using instruction here
Does XMod work in Bluestacks?
This is the screenshot I got

you did the same as described by @Haider Amin, on the link u provided above?

Basically I uninstalled bluestack and reinstalled a rooted one

can anyone play xmod coc with bluestack as of now?


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Developer option "Do not keep activites" gets stuck
I'm rocking a Samsung Galaxy S6, 5.1.1, build number LMY47X.*
When turning on the "Do not keep activities" developer option, the toggle turns green.  It is toggled back off as soon as I navigate away from the developer options screen, and my testing shows that it is indeed off.
A workaround was to toggle it on, then lock the phone.  After unlocking it, the toggle stays on and activities are not kept.  The opposite problem is then present: it won't turn off.  The workaround above does not seem to work in this case (I wonder if it was a fluke).
Some googling brings up a few instances of people with S6's and Note 5's with a similar problem, and a few conspiracy theories around samsung intentionally leaving it locked on, but nothing concrete about how to solve this.
Is this a bug, a dirty Samsung battery-saver hack job, or am I alone in experiencing this?

Is it a rooted phone?

No, it is a stock phone.

Mystery solved!
Clicking the toggle does nothing.  Clicking the text itself works, though.  It looks like Samsung's devs have a click listener on the list item, but not the toggle switch itself.

Same for Galaxy S7 Edge, bug reported here: http://developer.samsung.com/forum/board/thread/view.do?boardName=SDK&messageId=298733&startId=zzzzz~

I have a galaxy prime core phone that I upgraded to s8 and tried the smart switch. Kept getting that same message with the same results. What I did was toggle the button off for ALL developer options at the very top of the screen. It worked. Transferring media as I am writing this. One note though, this is an extremely slow process, might want to try just transferring via a computer


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How do you backup your stock recovery from an unrooted Android device?
TL;DR
Okay, so for the past month I have been researching how to do this, either on Windows or Linux..
I have yet to find a direct answer, or anything which is relevant.
I am a lot more comfortable doing this on Linux than I am on Windows, as I am a lot more familiar with Linux than Windows.
I'm relatively new to this whole thing(as well as Stack Exchange).
Question
If there is a relatively universal way of backing up your stock recovery from an unrooted Android device (on Snapdragon and MTK chipsets) that would probably be preferred, unless that is something that is dependent.

For backup of non-rooted devices with an MTK chipset, I've seen recommendation of MTKDroidTools at some places.

Possible duplicate of Creating a .dd image of a Galaxy S3 without rooting the phone

Afraid there is no such thing:

stock recovery itself doesn't offer any backup options
other means of backing up a partition (and we're speaking about the /recovery partition here) always require root, as no other user has the required low-level access to file systems

Creating a real complete backup of a virgin device before attempting any system modifications (such as root, flashing custom recovery) is a hen-and-egg issue: you cannot create images of the device's partition without root – and the partition ends being "virgin" as soon as you root the device:

to create images from partitions other than /recovery, you'd need a custom recovery (to run dd or do a nandroid backup)
to create an image of the (stock) /recovery partition, you'd need to root the device (in order to run dd from within the running Android system)

To sum up: if you want complete stock images, you'd need two similar devices. One you root to obtain the stock recovery – and the other you flash a custom recovery to obtain images of the other partitions. Hen and egg get a little bit smaller only, though, as in many cases1 installing a custom recovery again requires a rooted device.

1: there are exceptions to that, but I can't give you a complete list. To my knowledge, e.g. Samsung kies seems to permit flashing alternative ROMs and recoveries. Plus some stock devices seem to accept update.zip files to flash from recovery even if those are not signed with the manufacturer's key.


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Windows claims that my device has malfunctioned?
The issue (summarized)
My phone will not be recognized by ANY computer, regardless of OS, with or without drivers. Kies is not installed, nor Android Transfer (in the case of my iMac), and I am at my wits end. What can I do, if anything?
TL;DR
I have a bit of a problem I am completely lost with...
Bit of a backstory. Three months ago I was given a Refurbished Samsung Galaxy Avant with a one month warranty. It worked perfectly; computers recognized it and allowed me transfer files, Odin saw it (though I didn't do anything with it. I still had the warranty to wait out first), everything. Now skip forward two months.
My warranty is finally over. I got excited (all the bloatware on the thing was beginning to drive me nuts) and plugged in my phone to load it on Odin. But then Windows gave me an error: Your device is not recognized or has malfunctioned. (yadadada. Don't want to write the whole thing.). Confused, I did what every good techie does: I googled my problem. The results all said the same thing: try a new port, try a different cord, do you have drivers installed? etc.
I tried everything. I restarted my phone, restarted my phone in the stock recovery and cleared the cache, tried changing dialer settings to adm or mtp or both, I restarted my computer, I tried all my USB ports, I tried all my usb cords, tested my usb cord and ports by plugging in another phone (which it recognized properly without any difficulty.), I uninstalled and reinstalled drivers. I even went as far was factory resetting my phone and reinstalling Windows 10 (which was annoying, but I needed to anyways), to not avail. Getting desperate, I tried booting into my Ubuntu installation. Ubuntu didn't recognize it. I tried my other PC I have (running Windows 7), got the Malfunctioned error again. I even tried my late 2013 iMac (which is a completely different post I could rant about). Nothing is recognizing my phone, and I am at my wits end with what to do, if anything.
I tried taking it back to where it was purchased from, but they told me they can't do anything about it. It was two months past warranty and it charges just fine. Computers just won't recognize it or the internal SD card.
What I have tried:

different USB cord / cables (including the cable I used a few nights before for flashing another device)
different USB port
tested both ports and cords by plugging in a different Samsung device, which it recognized and opened properly (so I'm 99% sure it isn't drivers)
went to dialer settings (*#0808#) and changed to mtp+adm.
went to stock recovery and cleared cache
factory reset phone
reinstalled Windows 10 (really wasn't that desperate. Needed to reinstall anyways)
uninstalled and reinstalled drivers
tried different computers
tried different OSes (including Windows 10, Windows 7, Ubuntu 14.04, and El Capitan) of which none will open or recognize my phone
removing and putting back sim card (weird trick some claim it works)
turning on/off developer mode/debugging in settings
Even one or two highly recommended rooting apps were tried.
I have literally almost tried everything.

Any help whatsoever will be helpful and sorry for all the information! I just wanted to make sure I didn't miss anything... Thank you! <3
if you ask why I am so desperate for root on an otherwise perfectly working phone: I dislike KitKat (give me lollipop, marshmallow, or even jellybean any day of the week), and all these built in bloatware is driving me crazy and I want to get rid of them

Okay, so really late reply, but I thought I might as well update. Apparently my phone has a faulty USB port and I don't have any way to fix it. Using Kingoroot, I managed to root my phone then promptly changed it to SuperSU. I then used System App Remover (Root) to get rid of those bloatware apps I hated so much. Finally, using Flashify, I flashed TWRP.
Searching XDA I did find a ROM for it, but it is a bit outdated. However, it still works, and it is what I am using right now until I can get around developing my own, when and if that may be.
Thank you guys for your support and ideas anyways!! <3


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Apps are continuously getting crashed one after the other
My android phone (Motorola moto g) is behaving weird from few days. After successful boot of the phone, all the apps in the phone started crashing. I only see "unfortunately some-app is stopped working" message in the middle of the screen. I don't have any way other than to tap on "ok", doing this the same message appears again.
When I try to factory reset phone from boot menu, the phone reboots automatically. If I connect the phone to a computer using USB the device is not getting recognized by the computer.
I am not sure on how to solve this issue or factory reset the phone. Please let me know alternatives you have to solve this issue.
The screenshot of fastboot screen:

Can you boot into [tag:fastboot] mode? If yes, then setup prerequisites for fastboot in PC and execute fastboot -w or fastboot erase cache and fastboot erase data commands. This would cause data loss - virtually everything you created or moved into the internal storage of your phone. Let us know the results.

@Firelord I have access to fastmode commands, but the commands doesn't format the phone...

You're saying they were successfully executed and still the phone doesn't seem to be formatted? Is the bootloader unlocked?

@Firelord Bootloader seems unlocked

Jaguar, this may seem a bit of a hassle but can you post the screenshot of the window from which you successfully executed those commands? I'm interested in output of the commands. Also, when the device is in fastboot mode, what do you see on the screen of your device?

@Firelord added screenshot


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Access files on phone with broken screen
I spent a night in the desert in Jordan and the next morning my phone was all wet and the screen went black. That was a few days ago, I'm home now and have bought a new phone (same one). I disabled Google Drive backup and want to access my numbers and photos and whatsapp messages and a couple of other things onto my new phone.
I spent a good two hours googling this question and found some good tips, none of which have worked so far.

My phone is a Motorola Moto X 2nd Gen
I can't see anything on the phone except for a 2mm  purple(ish) bit on the top
I can turn the phone on (doesn't have screen-lock) and blindly click around. I managed to play a song on spotify for example yesterday
I can also turn on the torch or the camera by shaking or twisting the phone
I don't have USB debugging enabled
when I plug in my phone onto my PC, the device shows up but is empty, even when the phone is unlocked

Does it help to buy a OTG (USB) to try to access my phone that way? (for exmaple to turn on wifi)
Or does it help to try to somehow enable USB debugging to try this:
http://lifehacker.com/android-control-lets-you-use-your-handset-even-with-a-1594719124
Note: I've already checked with several questions from the broken-screen tag-wiki:

How to backup broken screen phone when USB debugging IS NOT enabled? requires Samsung Kies (so it's not an option for a Moto G)
How can I control my Azpen Android Tablet with a broken screen without root or usb debugging? is a good idea if the screen still works, however, my screen is completely black
Broken screen while debug mode was disabled. How can I re-enable adb? sounds kinda promising but I have no idea how to start my phone in fastboot mode or how to get a recovery system running

I'm not very tech-savy so please go easy on me.
Cheers for any help!!

Welcome to the Android Enthusiasts! You've picked the right tags already, but might have missed their associated wikis: May I suggest you starting at our broken-screen tag-wiki, which holds some first-aid plus links to common issues and their solutions?

Thanks for the link, I don't have KIES (its for Samsung) and can't enable USB debugging.... I could try to blindy enable it but apart from that I dont see a good solution

You've seen the links to How to backup broken screen phone when USB debugging IS NOT enabled? / How can I control my Azpen Android Tablet with a broken screen without root or usb debugging? / Broken screen while debug mode was disabled. How can I re-enable adb? Didn't any of those get you started? What did you try, where did it fail?

Hi Izzy, the first Link requires the volume button or KIES which doesnt work since my phone isn't from Samsung. The second link is a good idea if the screen still works, however, my screen is completely black. The 3rd Link (http://android.stackexchange.com/questions/12834/broken-screen-while-debug-mode-was-disabled-how-can-i-re-enable-adb) sounds kinda promising but I have no idea how to start my phone in fastboot mode or how to get a recovery system running. If you could help me with that that'd be grand!

I've integrated those facts directly with your question (to make them easier to spot). As for getting fastboot running: same game, check the fastboot tag-wiki for a starter :) Big pointer: Always check the tag-wikis first (and mention if you did and what you've tried from there). They often have good details to get you started :)

cheers Izzy, so basically I need to download ADB and then I should be able to use adb reboot bootloader to start the phone in fastboot and somehow get a recovery system running. Ill try that at home.

As for ADB: Make sure to read the … adb tag-wiki (there we go again :) Will save you some headache and resources (you won't need to install the full Android SDK as it's often said, for example – a hand-full of files are completely sufficient).

The adb command needs the phone to be in USB debugging mode. Have you tried the Motorola Phone Tools desktop application - it can backup some data from your phone. Or this?
Moto X has stock recovery which may have backup data option - entering stock recovery on MotoX.

Thanks pbhj! I didn't know these tools will defo check them out. Especially since adb is useless since I don't have usb debugging enabled!


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Removing Cheshire Police virus scam
My Android tablet is locked by a Cheshire Police virus scam ransomware.
How can I remove it? I am in safe mode as I write this.

From Naked Security by Sophos (it's detected as Andr/Koler-A),

Booting into "Safe mode"
Method 1
(Reported to work on Google devices and various Android Open Source Project, or AOSP, derivatives like CyanogenMod.)

Press and hold the power button as you would to power down or reboot.
A menu will pop up.
Tap and hold the “Power off” option.
If nothing happens try the same with “Reboot”.
A dialog should appear offering you to reboot in Safe Mode.

Method 2
(Reported to work on Samsung Galaxy S4.)

Power down.
Turn on and repeatedly tap the soft-button for “Menu.”

Method 3
(Reported to work on Samsung Galaxy S3 and others)

Power down.
Turn on, then press and hold Volume Down (Galaxy S3 and others), Volume Up (HTC One and others), or Volume Down and Volume Up together (various Motorola devices) when the vendor’s logo appears.

If you have managed to select Safe Mode, you will see the text “Safe Mode” at the bottom left corner of the screen.

To get out of Safe Mode, try simply rebooting.
If that doesn’t work, try rebooting using one of the button-press options listed above, starting with the one you used to engage Safe Mode in the first place.
What to do when "Safe mode" is active
This variant of the malware installs itself under the name BaDoink (apparently the name of a well-known online porn service), like this:

After booting into Safe Mode, third-party apps will no longer show up on the Apps page, as you can see here:

Go instead to the Settings menu and choose Apps:

This will bring up a list of downloaded (third-party) apps, including the Koler-infected BaDoink:

Tap on BaDoink; this won’t run it, but will open up the program’s App Info screen:

Tap on Uninstall, and you are almost home:

Choose [OK] to uninstall and you are done.
You may now reboot out of Safe Mode.
Hope this helps!

Staying in safe mode, go to Settings > Application manager and remove suspicious applications from your device and reboot your device to normal mode.
Note: If you are unable to detect suspicious Apps try Factory/Hard Reset.(backup your data before performing reset otherwise data may lost).


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Hide device information pop-up on Galaxy S3
In my Samsung Galaxy S3 (GT-I9300, rooted, SuperUser installed), I have a static pop-up that shows some information about my device hardware and doesn't hide. The pop-up has a background color and yellow text. It has some information like:
PDA:blah
Phone:blah
CSC:blah
and more...

How can I hide the pop-up?

It seems your device is in Factory Mode. To exit from it manually:

Open file manager that can access root folder (e.g. Root Explorer, ES File Explorer)
Go to /efs/FactoryApp/
Open factorymode file as text file. Change the content to ON and save the file
Open keystr file as text file. Change the content to ON and save the file
Reboot the device

Alternatively:

Install Terminal Emulator
Type su
Type (or copy-paste)
rm /efs/FactoryApp/keystr
rm /efs/FactoryApp/factorymode
echo -n ON >> /efs/FactoryApp/keystr
echo -n ON >> /efs/FactoryApp/factorymode
chown 1000.1000 /efs/FactoryApp/keystr
chown 1000.1000 /efs/FactoryApp/factorymode
chmod 0744 /efs/FactoryApp/keystr
chmod 0744 /efs/FactoryApp/factorymode
reboot

You can also exit factory mode and remove the annoying message without root, but it won't fix it:

Go to Settings > Application manager > All
Search Factory Test and "Clear data", "Clear cache"

Reference: ZiDroid - How to Exit Factory Mode for Samsung Galaxy Devices


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Crash report: Enter key makes newline. How to send input?
i'm trying to send feedback on an app that crashes. I run the app, when it crashes i get a popup asking if i want to report it, which sends me to a Feedback form with:

email to use
Write your feedback text field
Include system logs checkbox

After feedback text is typed Enter key just adds a newline. There's no Send button to click on, so it seems there's no way to proceed...
I've tried different keyboard apps, no luck with google keyboard, swiftkey or even keyboard pro which has a setting to force enter key to validate on some apps.
Using playstore 6.0.5, android 4.2.2

Based on my experience, the "Send" button should be on the bottom of the dialog/screen. Perhaps your keyboard hid the portion of the screen? Could you provide a screenshot otherwise?

Ah, found it at last:
Turns out the "send" button is the hardly visible white triangle in the top right...


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Upgraded to Marshmallow, now I can't merge my conversations in Hangouts
I have a 2014 VZW Moto X that I recently unlocked the bootloader on. So I upgraded to CM 13. Previously, when I was on Lolipop I used Hangouts as my default texting app. The majority of people I was talking to from within Hangouts was over SMS, but a a few Google Chat conversations were in there too. I was always able to send and SMS from my phone number to any other phone number.
Now, on Marshmallow, it seems I need to switch over to my "SMS" profile in order to see my texts and to send texts via my carrier number, and to see my Google Chats conversations I have to switch over to my gmail account. The account switching it all from within Hangouts, at the top of the sidebar. Also, to access the Hangouts dialer I need to be switched over to my gmail account. This was never the case before. I think back on Lolipop I was always signed in as my gmail account, so I had access to the dialer, google chats, but also my carrier SMS messages.
I have "Merged Conversations" enabled, and Hangouts is my default texting application. Is there some way I can get back to how I was using Hangouts before? With all my SMS and Google Chat messages in one list?
Thanks!

Of course, as soon as a I post this I figure out the answer.
I ahd to go into my SMS settings from within Hangouts and change the "Default SMS messaging account" to my gmail and "Send SMS from" to my carrier number.
Now there are no longer two accounts to switch between in the menu, and all my Google Chat and text messages are in one list. I also have to ability to switch over to the dialer.


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SuperSU app gives "No SU binary installed" error
I have a (partially) rooted Samsung Note 2. I can't access the SuperSU app.
Whenever I try to open it, I get the error No Su binary installed and it doesn't install it.
I used Root Checker App too and it says the phone is not rooted completely.

Possible duplicate of Galaxy S3 , Supersu reports no SU binary installed

Did you actually flash the latest SuperSU zip with custom recovery? The way you should do it is flash custom recovery, flash the zip, enter the app, and then UPDATE through play store, not install through play store

Couple of things you can do here try to uninstall all the applications that are related to super user. first install" System app remover and uninstall the applications restart your phone and install root checker-supersu.
Ping me in if you find any more issues.


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Can files be renamed within Droid Explorer
I want to rename otacerts.zip in a KitKat install on an LG G2 LS980 ZVD and can see no way to do this within Droid Explorer.  Is there a way to do this?

As the Developer of Droid Explorer:
If the file lives in a location on the file system that is mounted as readonly you will not be able to rename a file. This is for security reasons. The same thing goes for deleting a file. This is something I look to address in the future, but have not found the best solution to allow this safely yet.
Otherwise; you can select the file, and click F2 to rename. Or select the file and click it a second time. There is not a menu item to do this action, which there probably should be, I will get that into the work items and prioritized.


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How do i reinstall the android OS?
I accidentally wiped my tablets systems firmware in recovery mode which deleted Android it self. But what do I do now?
more info
Samsung Galaxy Tab 4 7.0
Android version: KitKat 4.4.2
TWRP recovery
That was my Stock Rom. I just need it so that i can revert to it if need be.

There are many things you can do.
But first you have to identify which tablet you are using, if its samsung then install kies and recovery will take you through the process.
Second check your model number xyz whatever.Download the rom to your pc and
Transfer the downloaded ROM from your computer to your device. You can use the USB cable to perform this task,leave the ROM ZIP file in the root of your phone's SD card; it will make it easier for you to find the file when you need it.
visit this link you will understand more.
http://androidmtk.com/flash-stock-rom-using-smart-phone-flash-tool


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How to keep my screen light on during the call (Nexus 4, Android 5.1.1)
I have a Nexus 4 (Android 5.1.1). My proximity sensor does not work well. I don't have any cover. The distance it detects is always 0 cm.

One solution I found is turn on "Power button ends call". However I
need use my keyboard during the call.
I also tried some proximity sensor reset apps, but they do not work
on my phone.
One
solution
I found is to keep the screen light on. But I don't have this
setting on my phone.

Is there any other way to keep my screen light on during the call or other solutions? Thanks

See if this helps: Screen turns off during call due to problem with proximity sensor - Xperia Z3 compact (both question and the answers there).

It does not work... But still thanks!

I had the same issue and had to replace the sensor (I gave up on software solutions).
The sensor is very easy to replace but you need to buy it (I received it from a broken Nexus 4, which had the sensor working fine!)


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Easiest way to switch to a userdebug build on Nexus 6P?
I just got an Nexus 6P, and unlike with my previous phone, I would prefer to keep the firmware as stock as possible this time while still enabling debugging/root access. (for app development) On my earlier phones, I used CyanogenMod because I wanted the features, but conveniently, it happens to ship as a userdebug build. This time, I would like to stick as close to stock as possible.
I found the official factory images for Nexus devices, but it looks like they only have the "user" builds, and I know Google does build official "userdebug" and "eng" images, because I've seen them before, but now I can't find them. Have they been deleted off the Internet?
Worst case I suppose I can build them myself from source, but I'd rather use the official images since I'm not going to be hacking on Android itself (at least not yet), and I'd also prefer to avoid having to rebuild every time there's an update. (it also requires a lot of disk space, more than I currently have free on my laptop, and the build system is too architecture-dependent to run on my server)
So, the question is: Is there an easier way to get a userdebug build for Nexus 6P? (or Nexus devices in general)
Alternately, is there some way to de-cripple USB debugging so I can debug the released version of my apps and either get a root shell or at least have some other way of seeing my own files?

change the build type in /system/build.prop to userdebug, edit the default.prop in the boot.img ramdisk to ro.secure=0 and ro.adb.secure=0 you must of course be rooted or have access to a "stock" boot.img


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Play songs randomly and endlessly
I made a profile in Tasker (it runs on boot) for my (rooted) Android box. The tasks are:

screen always ON
play randomly all the songs from a dedicated folder.

It works. But I need to play endlessly the songs in the folder when Tasker ends playing the last song.
What I'm looking for is to loop the action "play songs from folder" when it's ended but I don't know how.
I tried a "Goto" but Tasker runs the task even if the playback runs. My Android box starts to slow down very fast because I think Tasker repeats the task endlessly and plays the first song repeatedly at the same time.
This is how it looks like at the moment (very simple) :
Profile : "On start up" -> Task "Music"
"Music":

Event action : "Stay awake"
Media action : Play media from folder / random
only tested :
Task action : Go to "2"

How do I achieve the goal?

Even after an edit, I still don't think the title is unambiguous or doesn't have more than a single meaning. Perhaps, others can make it much clearer.

It appears that the action Media → Music Play Dir cannot play files for infinite times. I tried with multiple Maximum Tracks value (with(out) Random enabled) and reached the conclusion that the maximum number of time Tasker would play a media would not be more than the number of playable files in the working directory.
Enough about failure. Let's come to business. I came up with this following simple approach of mine:
We're going to list all the files in your working directory (the same directory where your media files are kept) and store it in a variable. We will randomly select a file from the previous output, get the duration of the file, play it, set Tasker to wait for that much duration, then loop back to where the random selection of a media file occurs.
Actions

Files → List Files:

Dir: working directory where media files are kept
Match: *.mp3/*.wma/*.3gp
Variable: %tracks

This step list all the files with MP3, WMA and 3GP extension available in the working directory, creates an array %tracks and fill the path name of each file as a value in that array.
I learned this step from this post of UncleMike.
Variables → Variable Set :

Name: %max_tracks
To: %tracks(#)

We're creating a variable named %max_tracks and assigning the size of %tracks array as its value. This variable would be used only in next step.
Variables → Variable Randomize:

Name: %rand
Min: 1
Max: %max_tracks

This step randomly selects a value in the range 1-%max_tracks and assigns the randomly chosen value to %rand.
Media → Test Media:

Type: Music File Duration Tag
Data: %tracks(%rand)
Store Result in: %duration

This step finds the duration of randomly chosen (%tracks(%rand)) media file and assign the duration as a value to %duration.
Variables → Variable Split

Name: %duration
Splitter: :

It is my assumption here that all of your media files are less than 59 minutes 59 seconds in duration. The duration received in last action is in the format MINUTES:SECONDS. In this action, we're splitting variable %duration at :. This would store MINUTES in %duration1 and SECONDS in %duration2.
Media → Music Play:

File: %tracks(%rand)
Stream: Media

This step plays the randomly chosen media file.
Task → Wait:

Seconds: %duration2
Minutes: %duration1

This step makes the Tasker wait for the amount equivalent to the duration the randomly chosen would be played for.
Task → Goto

Type: Action Number
Number: 3

This step repeats the cycle from action 3 for the purpose of playing another randomly chosen media file.

Note: The Variable Randomize action of Tasker could bug you if the files are very short in numbers. That's something I can't help with.

@moderator : Please don't delete this comment again because it's not only a "thank you" message
Thank you very much, I'm very impressed by your work and I'm sure I couldn't find all of these tasks by myself !
In my folder, there are 45 songs. Do you think it's enough to avoid a bug ?

Oh OK, sorry... Noob mistake.
For the moment, I can't find any option to mark your answer as accepted.

I was in beginner mode so I couldn't find how to assign the variables in task 7 but that's OK now :)

You were right, the variable randomize action bugs me... I've tried to delete the action and play the songs alphabetically but, once again, I failed... Can you help me again ? Thanx.

Not here. A poster is supposed to address the original query of the question, not the subsequent queries found somewhere in the comments. If you've a new question or an extension of the current, ask it as a new question.

Ok. I'll try by myself again before annoying you in another thread ^^


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Unfortunately WhatsApp has stopped.
So, yeah. The infamous error. I know several ways of "fix" this. But, Factory reset, erase cache, erase data has not work. When I'm trying to put my phone number for confirmation in the app, it closes. I'm not sure what's happening, any ideas?
My phone is and LG L35.

[tag:logcat] may help you a bit. See http://forum.xda-developers.com/showthread.php?t=1726238 if you're new to logcat.

is this happening after you took update of WhatsApp app? or...?

Install old version apk over the new one(i.e don't uninstall new one, try to install an old version apk on top of the newinstalled one) I read somewhere (MIUI forum) that overriding on new version solved the issue for some.

@AADTechnical No, no update at all. Just started to happen a few weeks before.

@Manubhargav Oh, I thought that was not possible anymore, will try that too.


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How to root Bluetimes 3584F Android TV box?
I need to move the apps to SD card because the internal memory is almost full, but I can do that only if it is rooted. So, I need to root my Android TV Box, Bluetimes 3584F.
This is the firmware link to download and the guide as install it on Android TV Box: firmware_Bluetimes_3584F.zip
Upgrading guide:

Unzip the downloaded firmware file, you will get 4 files named "g18ref-ota-XXXX.zip", "factory_update_param.aml", "u-boot.bin" and
  "recovery.img".
Copy the 4 files to the root directory of your SD card.
Take off the power adapter from your media player and insert SD card to the card reader slot.
Press and hold the reset hole on the back of the media player(beside the power socket), then connect power adapter to this
  item, still holding the reset hole
When you see the upgrading process bar showed on your TV screen, you can release the reset hole.

After firmware updating finished, TV box will reboot automatically.

I appreciate any help.

Download the utoo-root-signed.zip file from XDA Forum and move it to SD card.
Download the firmware_Bluetimes_3584F.zip file in question, unzip it and move the files quoted below to SD card:

factory_update_param.aml
u-boot.bin
recovery.img

Rename the utoo-root-signed.zip inside of SD card to g18ref-ota-20131220.zip.
Do the steps 3, 4 and 5 of the "Upgrading guide" in question.

P.S.: Even with the phone rooted I needed to create a 2nd partition EXT4 on SD card to move the apps to it by Link2SD app.
Thank you very much to stane1983.


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How do I unpair a device?
I'm using Android 4.2. I paired with it once and never want to again and it constantly tries to connect with my phone sucking up the power and not allowing my headset to connect.
How do I unpair it?

You just go to Settings, Bluetooth, and delete the device.

UI designers are complete muppets. I have it under Settings>Connection>"Bluetooth (On)" which incongruously behaves not only as an on/off switch but also as a submenu-opening button, where you then get the devices which you can then "unpair". For some reason in the domain of "huh WTF?" the unpaired devices are then moved to a rubrique named "available devices." Makes complete sense. Wouldn't it be simpler to have all of this in the swipedown menu (along with some currently grievously missing info on the bluetooth connection, like crypto levels etc.)

@DavidTonhofer Often these settings are sensitive to where you touch them... Like if you press on the left side of the menu entry it opens the menu, but on the right side it toggles the service. The WiFi setting on my Pixel is like that.

May this help you,
Goto your Settings > Bluetooth  and select the device which you have paired then click on Unpair.


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Turn on USB debugging using command-line
I have a Samsung Galaxy S2 and a PC running Debian 8. How can I turn on USB debugging using command-line on my PC without touching the phone?

This question is for the Galaxy S3 but is very similar but unfortunately does require root : http://android.stackexchange.com/questions/120394/can-i-enable-usb-debugging-using-adb

If I may ask, what are you aiming to achieve by doing this? There may be a better way to do it.

USB Debugging is activated on the device... You cannot do this "remotely" since without USB Debugging, you can't execute the proper commands to enable/disable it, or give your computer authorization to use USB Debugging. You must be able to physically use the device to enable this feature.

@acejavelin: you can enable USB debugging using an SSH server. If the Android is rooted, run an SSH server, get remote shell access on PC and make changes.

@Firelord True... The user made no mention of root or being non-stock, guess I shouldn't have assumed. This would still require interaction with the phone though to enable SSH.

If the question is simply "using the command-line"
Let it be simple (root possibly[1] required):
settings put global development_settings_enabled 1
settings put global adb_enabled 1

And then you need to
echo "mtp,adb" > /data/property/persist.sys.usb.config

If you want to do this without touching your phone
Then I'm feeling interesting because in most cases you won't gain access to command line via PC before enabling ADB, so it's impossible to enable this prior to touching your phone.
It is in any case possible but made extremely difficult. Please also bear in mind that if your bootloader hasn't been unlocked yet, unlocking it will wipe all data on your phone, making this alternate way mostly useless except for rescuing a brick.

1. Actually you only need either 'system' or 'shell' privilege, but 'system' is impossible to access without rooting and 'shell' is granted only if you're already logging in via adb, where it makes no sense to enable adb while it's already active.

Hm, and that works "using command-line on my PC without touching the phone?"

@Izzy See edit.

Yupp. Exactly those were my thoughts :) So taking the question literally, the only valid answer would be: "Not at all."

@Izzy Let's say, assume only the title is taken, this is actually a valid answer because it involves no GUI. Grab a terminal emulator and you'll find it right :)

Yes, that's how I've seen it. Haven't yet verified it, but +1 though :)

@Izzy I legitimately had a situation in which this was necessary... over adb.

Sorry, @NonnyMoose – but I don't get it: how can one use ADB to enable ADB? That's a henn-and-egg thing to me.

@Izzy I had temporarily enabled adb somehow, and needed it to be permanent.


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What is com.google.android.gsf.login?
Com.google.android.gsf.login. I seen this in my history and am having trouble figuring out what it is. Can you please help me ?

Google Services Framework Login. It comes with the label Google Account Manager. Search "Google Services Framework" on web to know about it.

com.google.android.gsf.login
Is part of the Google Services framework and one of the main components of any GApps package. It is basically the account manager for all things needing a login with Google credentials. If you disable or remove this app you will no longer have access to the Play Store nor any other app/service requiring those credentials.


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HTC One M8 boot into recovery mode after updating to Android 6.0
I am not an Android expert so I didn't try any root, flash, custom ROMs or custom recovery modes. All I did was approving to update my HTC One M8 to Android 6.0. After downloading updates and installation finish, my device booted into stock recovery mode with the message:

I've tried wiping cache and factory reset several times with no success.
P.S: I don't have SD card on my device and I tried booting with one SD card inserted and the same message show up.

Same issue reported on AndroidCentral, try if it fixes the issue.


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Is there a micro usb OTG otg to HDMI adapter available?
can a tablet with a micro usb OTG port connect directly to HDTV hdmi? how about HDTV USB port?

I am planning to buy a phone with a USB-C connection port. Then use a USB-C to HDMI Adapter.

I believe slim-port and MHL are your only options for USB > HDMI.
The better options IMO are Chomecast/Miracast screen mirroring.


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Samsung k zoom 5.8ghz
I was wondering whether it was possible to allow a rooted Samsung K Zoom to use the 5.8GHz channel? I was reading that I might have to edit the wpa_supplicant.conf to allow for 5.8GHz. In addition, I was wondering if the wifi card of the k zoom can even handle 5.8GHz?
Edit
To clarify I know the phone has 5GHZ band access. However I am looking for it to access the 5.8Ghz( or 5.7GHz is fine) CHANNEL. Around channel 149. Other samsung phones in the same family can, but not the k zoom. I was wondering if it is possible to enable it access to the higher 5GHZ channels; whether this is a software block or whether the hardware can actually not handle it. I have tried changing the p2p settings in wpa configuration file with no luck. Which was suggested from research I did.

You can try third party kernels/ROMs which may enable that spectrum but the legality may be an issue depending on your location. It's possible it's still a hardware limitation but more likely is that it's a software limitation.
You may have some luck fiddling with wpa_supplicant.conf per this post.

As a hint, you need to look into wpa_supplicant.conf to use all the
  5.8Ghz frequencies with the parameters:
p2p_oper_reg_class=
p2p_oper_channel=
For me Korea is 124 and 149
But yes, you need to be rooted

The editing the p2p part I mean

You try rebooting after? Could also try wiping dalvik cache. Maybe fiddle with p2p_disabled=1 > 0.

I did reboot. Didn't try the second thing though.

what I found was when I changed p2p_disabled, and rebooted. The value changed back to what it was originally.


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How can I dual boot Android and Windows Phone 8.1 or 10?
I have an Android phone with CyanogenMod installed(with TWRP Custom recovery). Specifically, it's an LG G2 (d803), and I was wondering if I could dual boot Cyanogenmod and Windows Phone 8.1 or 10. It would be awesome if I could because I could really use Microsoft's ecosystem but there are lots of android apps I'm not willing to give up.

Short answer is no.

There are some options out there, to answer your question directly the LG G2 has dual-boot support thanks to savoca on XDA who developed this custom bootloader for the G2.
Here's a quotation of what it is:

Autoboot is a custom bootloader that comes with many features not
  allowed by the stock LG bootloader, such as fastboot access and dual
  booting support. Autoboot does not replace your stock bootloader, it
  runs alongside at boot, and does not interfere with the bootloader
  structure that already exists on your phone. It can be installed over
  any ROM and can be uninstalled any time!

However, Windows phone OS compiled for the LG G2 is completely non-existent. That nullifies the point of using dual boot.
There are Windows+Android dual boot phones on the market, but they may be hard to find on ebay or Amazon. My best recommendation would be to hunt one of those things down and purchase.
Another angle to work from would be to install Bochs Emulator for Android and run VM images on your Android phone. I have used it and it works very well on Intel-based Android tablets. On the ARM-based G2 it will be very slow, not ideal for every day use. The other thing you'll have to finaggle with is getting a Windows Phone OS to run on Bochs. There are VMware images available to run Windows Phone (look here) but they are meant to run on PC. Ultimately I would not recommend this angle unless you enjoy tinkering and hacking things as a hobby and you just want to "see it be done".
Overall, your best choice would be to buy a dual-boot Windows Phone+Android device.


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Can it be specified that an application install to the user's home screen?
When installing an apk I noticed that the application's icon tends to be placed in the last available slot in the last page of the application navigation window (i.e. not the main window). At least on the Samsung Galaxy S6, the new application does not necessarily to go the first slot, but is sent to the very end.
Is there a way to specify where the application will install? For example, can I specify that I would like the icon to go to the first slot of the main screen if a slot is available?
Forgive me if I am way off base with the Android parlance. By main screen I mean the one(s) immediately viewable by the user -- the one in which you would otherwise have to manually bring a icon into by virtue of long-presses of the icon via the app navigation window.
This will do what I want, but the posted solution is such that the application itself does the shortcut creation, but such a method would fail on the first install.


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App showing unwanted ads even after restricting background data
I installed a game, and I am getting some unwanted advertisements despite already restricting background data for that app.
These advertisements do have a cancel button, but that does not work. I have to click on them forcefully and they will download something. After that, it will display a page with the application details and option "OK" and "Cancel". On canceling further, the ad dismisses.
In the end, I uninstalled the game, but is there any way to cancel such advertisement or completely block them?

Assuming these are what is called "Push Ads", they are coming from an app you installed, most likely a "free" game... Install Add-ons Detector and look at what apps are using push ads and remove them. I would also post a review in the app store the app was from stating the app uses push ads for the benefit of others.


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How to fix a ruined recovery mode of an Android device?
It seems like I ruined the recovery mode of my Android tablet. It's a HP Pro Slate 12 tablet with Android 5.1.1 on it. It's rooted. I wanted to install CWM Recovery to backup everything, but my device wasn't listed as a supported device. My friend told me I can install the LG G3 recovery instead because it's compatible. I installed that. Since then recovery mode completely disappeared. The device still boots in normal mode and works, but I cannot boot into recovery mode anymore. I really need it because the device boots normally but sometimes acting strange since I rooted it. I'd like to try unrooting it by going into recovery mode or doing a factory reset, but both options disappeared.

I tried holding down volume up+power buttons while turning it on, but didn't work.
Tried holding down volume down+power. Nope.
Tried rebooting inside Android into recovery mode with Quick boot app. It rebooted my device but again it went into normal mode instead.
Tried to reboot into recovery mode with ADP and FastBoot in Windows. Same stuff happened. The device rebooted into normal mode.
Tried to make a factory reset. DIDN'T work! Rebooted into normal mode once more. The factory reset hasn't deleted anything.

Any ideas? Did I lose the possibility of recovery forever with a single click?

You need flash stock recovery, then find any compatible cwm / twrp and then flash it.

I cannot do that. There is NO compatible CWM or TWRP recovery for my device. (it's not listed as a supported device) This is why I tried a so called "compatible" one which seems like it has ruined my device forever.

Ok , but you can find stock recovery. If yes then flash it.

I only found the latest update.zip for my device on the official website. I found nothing else. That's a zip file, not an img. I cannot use the update.zip without going into recovery mode.  :-(

Qualcomm devices usually have a workaround to flash entire internal partitions like with Oneplus 3 http://forum.xda-developers.com/oneplus-3/how-to/guide-mega-unbrick-guide-hard-bricked-t3405700 Similarly search if Unbrick Guides are available for HP Pro Slate 12. Good luck..

with ADB con your PC install the TWRP recovery and then with the comand "adb reboot recovery" the phone enter in recovery mode

If you have the official update package (a zip, usually), open it in an archive viewer and extract recovery.img. That's the stock recovery. Boot into bootloader (aka fastboot) and use the command line tool fastboot to flash it.
fastboot flash recovery recovery.img

As simple as instructed above.

fastboot flash was successful, but the device still does not boot to recovery. What's the next step?


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How to turn off Vibration in Google Hangouts [ Version: 6.1.109448852]
It is really annoying that the mobile phone vibrates on every message arrives on google hangouts after update, how to disable it ? I mean for all messages I just don't need vibration, only sound notification is required.

related http://android.stackexchange.com/questions/59046/google-hangouts-vibrates-although-vibration-is-disabled

I found my own solution to it. Here are the instructions:

Open hangouts. Click on the menu (three lines on top left corner of hangouts).
(Click image to enlarge)

Click on settings.  Click on your email account, on which you want to control notifications
.
Click on Notification under the given options.
Uncheck the sound or vibrate option to disable/enable them.
(Click image to enlarge)


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How to resolve boot loop problem on android PumpKinx 10.1" tablet
I've android PumpKinx 10.1 tablet with 5.1 Lollipop android os.
I did take backup of its stock recovery image.
Since there is no custom recovery image for this device I tried to flash it with twrp recovery image. But after running below command, device goes into bootloop.
I've tried many methods but no success.
fastboot flash:raw boot twrp.img

Any help would be highly appreciated. Thanks in advance.
Update :

Every time this screen comes

Then if we go for normal boot or recover mode goes to this screen

Recover mode has these options but none of this is working

You should know that we cannot use a recovery that was not created for that particular device. No one has compiled a custom recovery for your device it seems.. So, the only way is to build a recovery yourself. If you device has Mediatek (MTK) chipset, you can easily create CWM recovery using this method here: http://www.theandroidhow.com/2014/05/how-to-make-flash-cwm-recovery-without.html (You can find out what chipset your device has using apps like 'CPU-Z')

So, is your phone working now? If yes, if your aim is to root your device, try apps like Kingroot or Vroot or Towelroot or whatever......

Thansk @Gokul for spending some time on this questions. No, my tablet is not working please see updates in question.
I've tried with kingoroot, Towelroot non of these were worked for me.

As far as I can understand from your question, it seems you flashed some other device's twrp into your tablet's boot partition. The only solution is finding your device's boot.img somewhere from internet and flash it (it might be inside the firmware file if you found any). BTW, I'm wondering how did you backup stock recovery (without rooting or custom recovery)

I Believe you are using some non branded (fake or Chinese) device and unfortunately the device don't get updated officially. But you can do a couple of things with it first restore and enjoy the previous version, or contact the manufacturers of the device they will send you, your desired ROM, it will take a couple of working days. I had this issue back in the day, all I did to restore it and hard reset. After two days I got an email, but they wanted me to pay for sending me the new ROM.
visit this link you will understand more. http://androidmtk.com/flash-stock-rom-using-smart-phone-flash-tool