Log into windowsphone.com and use the Find My Phone feature to set a new lock code
- Go to http://www.windowsphone.com and sign to the Microsoft account associated with your phone.
- Select "Find My Phone" from the drop down menu that appears when you click on your name. Or just go to https://www.windowsphone.com/en-us/my/find
- Click the "Lock" link
- Enter a new 4 digit PIN code and press the Lock button.