Possibility of Hard brick with unlocking boot-loader and installing Custom ROM My android device CPU is MT6592 (8xARM Cortex –A7@1664 MHz) with instruction set 32-bit ARMv7. Board and product is ht1_107a_iball_mjk. Apart from this, Codename is REL, Internal Memory is 16GB and RAM is 2GB.

I did root and un-root my device multiple times.

I see connected device through adb devices command. After adb reboot bootloader and fastboot oem unlock, I confirmed on android device by pressing Volume Up key but there is no change on device screen and computer screen even after 30 min. I changed USB cable and USB port. However, there is no change.

Therefore, I am not able to unlock its boot-loader.

After adb reboot bootloader and fastboot flash recovery twrp.img, I found No TWRP or other Custom Recovery images are compatible for my device.

Therefore, I am not able to install Custom ROM as well.

I tried all above procedures multiple times and with multiple ways. However, at the end I am with Stock ROM (Android 4.4.4). And only two processes I can do successfully; rooting and un-rooting.

In such scenario, may my device be hard bricked, if I continue above processes multiple times forcefully?
First of all your phone isn't Hard Bricked.. Hard Brick is something in which you can't go into OS or even in recovery or fastboot. Thats called Hard Bricked Phone.. As from your question, it's just a device specific problem..

Before going into answer, you need to know feww things,

1) Root/Unroot: Rooting and Unrooting are OS specific. Which means you can root or unroot any phone with supported android version.

2) Bootloader: However unlike root/unroot, Bootloader is Device Specific. If you think your bootloader is locked, then you need to find a way to unlock based on your manufacturer or device model. 

2-1) Check If Bootloader is Unlocked :


Open ADB Terminal
Type "adb reboot bootloader"
After it reboots
Type "fastboot oem get-bootinfo"
If it says your bootloader is unlocked you can proceed
To reboot back type "fastboot reboot"


if the info retrieved says your bootloader is locked, then you need to find tools and files to unlock your device specific bootloader.. either your manufacturer released it or any other developer released it.. if you cant find anything.. then im sorry, you can unlock..!

3) Custom Recovery and ROM - as like bootloader, custom recovery and custom rom is depend on your device specific.. you cant flash other devices custom recovery or rom.. you may end up hard bricking your device for real if you did.. so beware..! may be the device's recovery you want flash may have the same chipset, but that doesnt mean it will work on you too..! cause a custom recovery or custom rom doesnt just based on chipset, it also based the device specific configuration and system files..! so beware..!