Latest Samsung Galaxy Alpha (SM-G850A) - ATT firmware
Samsung Galaxy Alpha (SM-G850A) firmware for USA (AT&T) (ATT): 1 build in the SamMobile archive, newest first. The latest is G850AUCS1BOC8 (Android 5.0.2, built 25 November 2016). Open a build to download it, or switch region with the country selector.