![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. Change PIN
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c90a9a2f-4701-44fe-ac0d-23dab0f215f2.png?width=206&height=456)
Press Change SIM card PIN.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c90a9a2f-4701-44fe-ac0d-23dab0f215f2.png?width=206&height=456)
Key in your current 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-2b9b99f4-e25a-4acc-9e3b-a359a91b76f4.png?width=206&height=456)
Key in a new four-digit PIN and press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-62e008ff-b50c-4416-97e7-667a412da43c.png?width=206&height=456)
Key in the new PIN again and press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c888890f-72bf-404c-a471-6639a2798a21.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)