How to factory reset Microsoft Nokia Lumia and hard reset.
Resolve also Lumia Bootloop
All data will be lost!
1.Power off your phone
2.Press power button and after phone vibrates once press volume down until you will see exclamation sign on the screen
3.Press in this order:volume up volume down power volume down
4.Wait until format ends and the phone restarts
Also Work for Nokia Lumia 520, 625, 630, 720, 920, 1020, 1320, 1520, 530