1. Find "Change SIM PIN"
Press the menu icon.
Press Location & security.
Press Set up SIM card lock.
Press Change SIM PIN.
2. Change PIN
Key in your current PIN and press OK.
Key in a new four-digit PIN and press OK.
Key in the new PIN again and press OK.
3. Return to the Home screen
Press the Home key to end the session and return to the Home screen.