How to lock Sim Card on Android phone?

How to lock Sim Card on Android phone?

To lock a SIM card on an Android phone, you can do the following:
Open Settings
Go to Security
Select More security settings
Tap SIM card lock or SIM lock
Toggle the switch next to Lock SIM card to lock
Enter the SIM card PIN
Tap OK
If you're locking your SIM card for the first time, you can use the default PIN. You can change the PIN by tapping Change SIM card PIN.
A SIM card lock protects the subscription linked to the card and prevents unauthorized access to your data. You'll need to enter the PIN each time you start your device, swap SIM cards, or restart your phone. Entering the wrong PIN three times will block your SIM card.