Latest Samsung GALAXY S III (SGH-I747) - ATT firmware
Samsung GALAXY S III (SGH-I747) firmware for USA (AT&T) (ATT): 1 build in the SamMobile archive, newest first. The latest is I747UCDLK3 (Android 4.1.1, built 15 November 2012). Open a build to download it, or switch region with the country selector.