The explained steps in this Guide will help you to Factory Reset Samsung Galaxy S8 Active, This Samsung smartphone comes with model number SM-G892A for AT&T Mobility USA, And SM-G892U for Sprint Nextel Corporation, T-Mobile USA and AT&T Mobility too.
There are two factory reset methods, The first one (Factory Reset Samsung Galaxy S8 Active from Settings Menu) you can use it when your Galaxy device is powered on, When the second one (Factory Reset Samsung Galaxy S8 Active from Recovery Menu) is used when your phone is Powered off.