Latest Samsung Galaxy Express 3 (AT&T) (SM-J120A) - ATT firmware
Samsung Galaxy Express 3 (AT&T) (SM-J120A) firmware for USA (AT&T) (ATT): 1 build in the SamMobile archive, newest first. The latest is J120AUCS4AQJ2 (Android 6.0.1, built 24 October 2017). Open a build to download it, or switch region with the country selector.