Hard Reset Nokia Lumia 520, 620, 720, 820, 920 etc Full Factory Reset

An alternative method to hard reset your phone is shown above. Press and hold down the Power, Volume Down and Camera keys at the same time. When the phone vibrates you can release the power key but continue to hold down the volume down and camera keys until the phone reboots to the start screen.

Note: Nokia has issued an additional set of instructions should the above method not work to reset your phone.

Until Wait the Phone Reboots and You Success