Bought a second hand Windows Phone 8 smartphone and you want to set it back to factory status? Or, are you selling yours and you don’t want the next owner to run into some of your personal stuff? A master reset will sort you out.
First go to Settings.
Then go to About.
Now scroll down to reset your phone. This process is not reversible, so only do it if you’ve backed up everything you needed from the phone. You won’t be able to recover anything. If you’re sure this is what you want, tap Reset your Phone.
You will be asked to confirm the reset. If you’re sure, tap Yes.
Windows Phone 8 really wants to make sure this is what you wan to do. You’ll be asked one more time if you’re sure — tap Yes.
The phone will be reset to factory settings. It takes a few minutes and all the content will be deleted.