Latest Samsung Galaxy S8 Active (SM-G892A) - ATT firmware
Samsung Galaxy S8 Active (SM-G892A) firmware for USA (AT&T) (ATT): 1 build in the SamMobile archive, newest first. The latest is G892AUCU5CTF4 (Android 9, built 19 June 2020). Open a build to download it, or switch region with the country selector.