I'm sorry if this has been asked before but I just can't find a definitive answer to this and I've been trying to search for an answer for nearly a week now.
My boss received a used Samsung Galaxy S3 from a friend of his in the states. It is a locked AT&T phone (SGH-I747) and it is on 4.3.
I managed to root the phone using CF-Auto-Root, which disabled Knox (whatever that is) and also installed CWM and was planning to flash 4.1.1 so I can unlock the phone using the *#NUM# method.
After reading a bit I've seen many people saying that you can't "downgrade" from 4.3 to anything else because it will brick your phone. Hence, I did not try and flash any other rom on the phone.
So I guess I'm just trying to get a definitive answer here because I can't find anything but rumors on this subject. I mean it's weird, I'd expect if you couldn't downgrade from 4.3 than it would be a bit more documented.
Has anybody tackled this problem with success?