I have forgotten the password for my Lumia phone
Reset your phone.
Important: Resetting your phone erases all personal content, including apps, and restores the factory settings.
1. Make sure your phone has enough battery power, charge your phone for at least 20 minutes.
2. Switch off your phone, and disconnect the charger.
3. Press and hold the volume down key, and connect the charger. An exclamation mark (!) is shown on the screen.
Acho que isso é a vantagem de qualquer telemóvel que dê para mudar de capa...