How to do a hard reset on SAMSUNG Galaxy A3 Core? - HardReset.info
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
How To Unlock SAMSUNG Galaxy A5 and A5 Duos by Unlock Code.
How to Network Unlock Your Samsung Galaxy S3 to Use with Another GSM Carrier « Samsung :: Gadget Hacks