Your PIN protects your SIM from unauthorised use if your mobile phone should get stolen. You can change your PIN to a PIN of your own choice making it easier to remember. Before you can change your PIN, you need to turn on use of PIN.
Tap the Navigation key.
Select Security settings.
Select SIM security.
Select Change PIN.
Key in your current PIN and tap the Left selection key.
Key in a new four-digit PIN and tap the Left selection key.
Key in the new PIN again and tap the Left selection key.