A PC, a compatible USB cable, and software like Nokia Care Suite or the Nokia BEST (BB5 Easy Service Tool) .
If the phone is still accessible but won't accept the code for specific settings, you can try a dialer-based reset. Note that this typically . Open the phone's dialer. Type the code: *#7370# . Nokia C3-00 Security Code Not Working
While holding these, press the until the phone vibrates or the Nokia logo appears. A PC, a compatible USB cable, and software
If successful, the phone will format and reset the security code back to . 4. Advanced Flashing (Technical Solution) a compatible USB cable