Nokia Lumia 900 Factory Reset Instructions

Method 1

  1. Go to Settings.
  2. Scroll down to the About listing and tap on it.
  3. At the bottom of the screen (you may have to scroll) you'll see a button titled "Reset Your Phone." Tap on it.
  4. Confirm, twice, you are sure you want to reset your device.

Method 2

  1. Turn off your Nokia Lumia 900
  2. Press and hold the following buttons Camera + Volume down + Power until your phone vibrates, then release only the Power key and keep pressing the Camera + Volume down for a couple of seconds 4-5s.