I have forgotten my lock code now what should i do?

Lock code: 1. 5 digits, Used to prevent unauthorized access to certain functions on the phone 2. Where: Tools > Settings > Security > Phone & SIM 3. Default: The default lock code for Nokia Series 60 devices is 12345. 4. Forgotten - If you've changed this code and forgotten it - you will need to visit a Nokia authorized service center, who will be able to reset the lock code for you. PIN code 1. 4 digits, an optional 4 digit code to protect your SIM 2. where: Tools > Settings > Security > Phone & SIM 3. Forgotten -If you keep trying, you'll eventually get locked out and need to contact your network operator for a PUK code PUK code 1. 8 digits, You'll be asked for this 8 digit code if you've entered the wrong SIM code more than the allowed number of times. You'll need to contact your network operator to get this lock lifted.