The default security code for the phones of this type is 12345. If you've changed it and it has been forgotten, then you have two choices:
- Visit Nokia Care in your city and they will reset the password for you (might cost money!)
- Visit a local phone service shop and they should also reset/replace the password with the one you want (also costs money)
Note: If you are under contract, this service is free as long as the phone is within the time frame of the warranty service.