How to unlock my nokia 3120c i forgot my security code

I cannot use other simpack/card becaude i forgot the security code

Hi, it's nothing to do with security code. Your Nokia is network locked so you need to get unlock code from network provider where is your phone from.Or visit your local unlock phone shop. Can be done while you wait for small fee.
Rate me if helped.Thanks.

Wat is restricted code for 3210c it is an o2 phone and i have a vodaphone sim ireland