Latest Samsung Galaxy Mega 2 (SM-G750A) - ATT firmware
Samsung Galaxy Mega 2 (SM-G750A) firmware for USA (AT&T) (ATT): 1 build in the SamMobile archive, newest first. The latest is G750AUCS3BOH5 (Android 5.1.1, built 29 November 2016). Open a build to download it, or switch region with the country selector.