How to Factory Reset Nokia Lumia 920
As we mentioned, a factory reset will wipe off all your data and files, which is why it is crucial to backup your data first.
1. Go to Settings.
2. Tap on About.
3. Tap on Reset Your Phone.
4. You will be asked if you want to reset your phone, click Yes to confirm the action.
5. Your Nokia Lumia will need a few minutes to perform a factory reset and it restart.
6. Once the task is completed, you can restore your data.