A couple days ago Samsung posted the source code for AT&T and T-Mobiles version of the Galaxy S3. Samsung’s posting of the source code is for the SGH-I747 for AT&T and SGH-T999V for T-Mobile so that developers can go crazy on the device with mods, apps, roots and whatever they want really. While your average Android user will not know what to do with the source file it is a piece of gold for those that do. The most useful aspect of the source codes release is that the average Android user will get most of their ROM’s and root access from this file.
Download the AT&T Samsung Galaxy S3 Source File Here
Download the T-Mobile Samsung Galaxy S3 Source File Here