Alright, I've had my Galaxy S3 i747 for a couple months now, and I bought it off a random guy on craigslist. Nothing is wrong with the phone don't get me wrong, but he put a custom ROM on it and I CANNOT GET IT OFF, and I can't put anything new on. I've desperately tried everything and I don't know what to do. It may be something to with my about phone menu. It says I have a Galaxy Nexus and not Samsung Galaxy S3. The About Phone menu looks like this:
SMP PREEMPT Wed Jul 4 12:40:58 KST
DIET ICS! I747 v8.08.12
Can anyone help me please? I'm just trying to get a jellybean rom so I don't have to wait forever for At&t to release it.