2. Other security settings > Set up SIM card lock > Lock SIM card: Enable
3. Lock SIM card:
Enter your current SIM card PIN: {4-digit PIN} > OK
4. Change SIM card PIN:
Enter your current SIM card PIN: {4-digit PIN} > OK
Enter a new SIM card PIN: {4-digit PIN} > OK
Enter the new SIM card PIN again to confirm it: {4-digit PIN} > OK
5. SIM PIN changed successfully.
