![Samsung Galaxy S21 5G](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-59f172d2-5dba-4569-94b6-41c456b4a98a.png?width=150&height=320)
Samsung Galaxy S21 5G
Android 11.0
1. Find "Set up SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-4f73f480-9f98-4a94-8b07-6a2eb0b3b093.png?width=206&height=456)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-77d72a60-0d86-4165-85a3-2b12fca4ad63.png?width=206&height=456)
Press Biometrics and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-2dd90458-9e34-4224-b890-6ea80ee7ce41.png?width=206&height=456)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-5cd13a21-d413-4323-99b1-1cdc7ac3adae.png?width=206&height=456)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-1d03eae3-ba33-4cbb-8d05-116bc5a5e554.png?width=206&height=456)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c90a9a2f-4701-44fe-ac0d-23dab0f215f2.png?width=206&height=456)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c90a9a2f-4701-44fe-ac0d-23dab0f215f2.png?width=206&height=456)
Key in your PIN and press OK.
If an incorrect PIN is entered three times in a row, your SIM will be blocked. To unblock your SIM, you'll need to key in your PUK. You can get the PUK by calling customer services on 191 from a Vodafone mobile phone. If you're using a land line, you need to dial 03333 040 191. Please note: If you key in the wrong PUK ten times in a row, your SIM will be blocked permanently. In this case, you need a new SIM from Vodafone.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-a072f361-6aee-4ff3-bc33-d73fca963418.png?width=206&height=456)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c90a9a2f-4701-44fe-ac0d-23dab0f215f2.png?width=206&height=456)