Factory Reset Protection. If you factory wipe an Android phone that still had a Google or Samsung account on it, you need to sign in to the same account again to use it. However, it is sometimes possible to switch away from the initial setup app, and then do whatever it takes to wipe the FRP data. On early Android (pre-2015), this might be as easy as setting the screen lock to Swipe and restarting.
Factory Reset Protection. If you factory wipe an Android phone that still had a Google or Samsung account on it, you need to sign in to the same account again to use it. However, it is sometimes possible to switch away from the initial setup app, and then do whatever it takes to wipe the FRP data. On early Android (pre-2015), this might be as easy as setting the screen lock to Swipe and restarting.