First of all let me introduce myself. My name is Armin, and joined this forum today to find out whats wrong with my GS3 and how to fix it. **Before I posted this thread I searched all the internet, but couldnt even find one person with my problem, so I marked it as unique.
-After I charge my GS3 it works fine the first 20 minutes;
-Then the signal (yes signal ! ) gets lost, screen starts to flash rapidly;
-Then it freezes (If I dont take out the battery it reboots it self, but failes to boot (I get into a boot lobby), so pulling out the battery is necessery);
-After I manage to turn the GS3 on, the battery is less than 5%, after few seconds, screen flashes rapidly again, and shuts down (no reboot);
-After aprox. 45 minutes I turn the GS3 on, and the battery is over 60%, after 10-20 minutes the problem occures again, and again.
-When I use the GS3 on charger, it works perfectly, after it gets charged and pulled of the charger, problem occures.
*I did following things (and none of them work):
-I did a factory reset;
-I did a hard reset;
-After getting frustrated, I installed a 4.1.2 firmware via odin and did a update to jelly bean via samsung kies.