I have recently used a Nokia 3200 cell phone but have just got a new, better phone. But when I tried to use the Nokia with another SIM card, it asked for the security code. It only works with my old SIM card. I looked in the security settings section and found that the security level is set to phone. I must have set it by accident and forgot the code.

Can anyone please help me? I've seen another post on this forum with a similar situation that seems to have been resolved and thought maybe someone can help me like they did that guy.

Thank you.