http://forum.xda-developers.com – Have an AT&T Galaxy Note II. It was rooted and there were some strange problems happening with the phone from time to time so I decided to go ahead and unroot it. As I have done before, I decided to restore the Galaxy Note II to its original firmware. I got the AT&T SGH-I317 firmware from Sammobile. Loaded Odin in Windows. (HowTos)