Latest Samsung Galaxy Amp Prime 3 2018 (Cricket) (SM-J337A) - ATT firmware
Samsung Galaxy Amp Prime 3 2018 (Cricket) (SM-J337A) firmware for USA (AT&T) (ATT): 1 build in the SamMobile archive, newest first. The latest is J337AUCU8BTA3 (Android 9, built 23 January 2020). Open a build to download it, or switch region with the country selector.