Samsung s4 stuck on logo Yesterday I installed the newest software update for the Samsung galaxy S4(GT-19505). At first, the phone was stuck on a loop of the update 'installing' to 100%, turning on then switching off and repeating. I did a battery pull and removed my SD card. when i went to switch on my phone and it was stuck on 'android is updating. i left it and fell asleep. this morning i switched it on and it started as normal but then froze and got stuck at the glowing 'SAMSUNG' logo. i have tried using the power+up+home to and cleared the cache partition but that did not help. i have also taken out and replaced the battery many times. Samsung Kies also does not recognise my phone. How do I fix this problem? I am a complete newbie when it comes to phones and the technical side of them and would prefer an easy guide as to how to fix my problem/what the problem is.I did a factory reset and wiped all my data with no result.please help.
Hard Reset your phone.. But all your data and apps will be gone.. 

Turn off the phone. Press and hold at the same time Volume UP,Home and Power keys. When you see Galaxy logo release the Powerstrong text key but continue to hold the Volume Up key and the Home key.

Release them when the Android System Recovery screen appears. Use Volume Up/Down keys for navigation and Power On key for OK. Choose "wipe cache partition", "Yes -- delete all user data", "reboot system now".

And click on Wipe Data/Factory Reset 

You are done then.