From within the Settings app, tap Cellular.
Tap SIM PIN.
Tap or slide the SIM PIN switch to ON.
To disable your SIM PIN, you will need to toggle SIM PIN off.
Enter your SIM PIN.
If this is your first time ever enabling a SIM PIN, you will need to enter the default SIM PIN provided by your service provider. Guessing your SIM PIN can result in being locked out of service.
You've completed the steps!
