Nokia Lumia 635 hard reset

Warning! Do this at your own risk! All your phone data (contacts,photos,videos,music,messages,aplications,games,files,) will be lost! Please make backup first if you can! 1.Power off your phone 2.Press power key and then,after the phone vibrates once, press volume down key until you&see excalmation sign on screen 3.Press volume up,volume down,power key,volume down 4.Wait until the phone restarts That&all! - - - Click here! How to fix spinning gears on Lumia!