![Samsung Galaxy S20 Ultra 5G](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-3cb91ddb-c165-4fa1-a78b-2e45ebf86257.png?width=150&height=320)
Samsung Galaxy S20 Ultra 5G
Android 10.0
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-956db39b-641d-4aef-b316-5bfd39d6f957.png?width=206&height=456)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-4f847bae-2241-40db-ae57-1271e6419e2e.png?width=206&height=456)
Press Biometrics and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-ec8fee32-3f15-45ca-bf78-7751e7b0a8a5.png?width=206&height=456)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-14cfe640-52e5-4608-8504-d2e90e2f6acb.png?width=206&height=456)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-6dc2ae6a-2abf-40d3-bdda-c5a0e92b0f28.png?width=206&height=456)
2. Turn use of PIN on or off
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-f07821d3-2f96-45d9-a333-1459b050de49.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-9b13180a-5e0b-4f1a-a782-707204986642.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-f07821d3-2f96-45d9-a333-1459b050de49.png?width=206&height=456)