Hi,
I called up At&T and even tried to talk them to give me the unlock code on chat but I was unsuccessful. They plainly refused saying, it used to be their policy but now we need to put in an online request (which I did) and it may be approved based on a bunch of criteria. All of this is going to take time and I am planning to leave next week. However, I tried to root my SGH I747 4.3 version using safe root on mac in one attempt! Lucky me! So, the super user is installed and I can install titanium back up (which needs root access) which confirmed that my phone was properly rooted! I have been reading a lot about unlocking this AT&T 4.3 version on I747, apparently, its a pain for many of the users. You cannot unlock it by entering in the service mode (only for 4.1.2 or 4.1.1) so the only two possible options are to either ask a third party or as the forums say, downgrade to 4.1.1 and then unlock it. I paid money on of the service sites and even they could not find a code for my phone. I am super paranoid about downgrading ( as I think I might run into the risk of bricking). How to I proceed this entire thing? Please help. Also, if I missed out on any information about my phone or rooting process, feel free to ask but I need help with this unlocking process.