Protect your SIM card with a PIN
You can use a SIM card PIN to help prevent unauthorized use of your SIM card in another device. For example, if you lose
your SIM card and someone tries to use it in another device, the SIM card can't be used unless the PIN is entered correctly.
After you set up a PIN for your SIM card, you must enter the PIN from the lock screen to use your device.
Swipe down from the top of the screen once using two fingers, or twice using one finger.
> Security > Set up SIM card lock.
Turn on the Lock SIM card switch.
Type a PIN, and then tap OK.
To remove the PIN from your SIM card, turn off the Lock SIM card switch. Type the PIN for your SIM card, and then tap OK.