[ad#ad-1]You can now update your AT&T branded Samsung Galaxy SIII to Android 4.1 through Samsung’s very own Kies Air which you can find the download link here for the software
http://www.samsung.com/us/kies/
The update seems to be at 318MB, brings in, Google Now, a performance increase and an overall bump in frame rate and “Project Butter”. Check out the video below for more details