I have recently bought a used samsung s4 ( GT-i9505 ) which was rooted on android firmware 4.2.2 (***MGA) and worked perfectly. When i unrooted and upgraded it on 4.3 ( ***MKF) , the phone suddenly starts freezing and reboot even thought it is in a safe mode! either the sdcard was being unmounted or i wiped data the problem exists! the phone stops responding and reboot! ( No 3rdparty apps is installed )
The producedure which i followed to unroot it and upgraded was:
1.i used triangle away to reset counter
2.i used odin 3.09 to flash the new android which i downloaded from sammobile.com
3.after firmware installation, i made a wipe data/cache
In short, my phone status goes back to "official" and the cpuz utility root status goes back to "no rooted"
Do you have any ideas about the solution? did i make anything wrong in firmware installation?
my phone is going to be useless, it's rebooting every 10-15 minutes.
Please either anyone knows or have any ideas about my issue let me informed making me a comment...