Resetting your mobile phone to factory settings means you are going to erase everything from your mobile including your personal data Emails, Contacts, Text Messages, etc. So its better to take backup of your impotent stuff when you are going to reset Windows Phone 7 mobile phone to factory settings. Lets see how to reset Windows mobile phone to factory settings.
Reset Windows Phone 7 Mobile to Factory Settings.
Slide left or tap the “Arrow” icon on Windows Phone 7 Start screen.
Tap “Settings” and then scroll down and tap “About” menu.
Scroll down to the bottom and find “reset your phone” button.
Tap the “reset your phone” button and read the instructions carefully.
You are done!