Here's how to perform a master reset on your Nokia Lumia 820:
- From the Start screen, swipe to the left.
- Scroll down to and tap Settings.
- Scroll down to and tap about.
- Scroll down to and tap reset your phone.
- Tap yes.
- Tap yes.
That's it - your Nokia Lumia 820 will now restart and be restored to factory settings.
See more helpful tips on how to do clever things on your Nokia Lumia 820 >