Open your phone’s Settings
Tap Security or Biometrics and Security
Tap SIM card lock or Set up SIM lock
Turn on Lock SIM card
Enter your current SIM PIN
Enter the new SIM PIN if prompted
Confirm the new SIM PIN
Keep the SIM PIN محفوظ and do not share it
If you do not know the default SIM PIN, contact your carrier
If you enter the wrong SIM PIN too many times, use the PUK code from your carrier to unlock it