Developers take note: Samsung is getting some more source code out the door, but it's just one device this time. The kernel source for AT&T's version of the Galaxy S4 is out, and it's up for grabs at Samsung's open source site.
Kernel source for a few other variants of Samsung's flagship have already been posted. In fact, this development means T-Mobile is the only major carrier whose GS4 hasn't been joined the open source club. It's a strange world when Verizon, Sprint, and now AT&T devices have kernel sources posted before T-Mobile.
The AT&T GS4 kernel source is available on the page linked below.