How to Soft & Hard Reset your Samsung Galaxy A3 (2016)
Samsung Galaxy A3 SM-A310F (2016) Hard reset - YouTube
How to Easily Master Format SAMSUNG GALAXY A3 (SM-A300F / SM-A300FU / SM-A300G / SM-A300HQ / SM-A300M / SM-A300YZ) with Safety Hard Reset? - Hard Reset & Factory Default Community