Hard Reset SAMSUNG Galaxy J3
1 . At the beginning switch off the cell phone by pressing the Power button.
2 . Afterwards press and hold together: Volume Up + Home + Power button, until you see Samsung logo.
3 . Then select from Recovery Mode menu "wipe data / factory reset" using Volume buttons to navigate and Power button to confirm.
4 . Choose "Yes -- delete all user data" to confirm the whole operation.
5 . After that select option "reboot system now".
6 . Well done! The hard reset has just been performed.
Samsung A7 Factory Reset passcode unlock
full tutorial ..........