How To nokia lumia 620 hard reset Remove Pattern Lock

Hard Reset/ Factory Reset Clear All installed App, games and Contact Number, Message etc. Don't Forget back up Your All Data Before Do This.

1.OFF Your Device First

2. Press And Hold Volume Down Key + Power key Together Until Vibrate Phone

3. After Few Second Show exclamation mark (!) Than Press Serial Key Volume Up -> Volume Down -> Power button -> Volume Down

Done