![Google Pixel 4](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-e26a4e19-3ad0-4b58-a0aa-24130c99d72a.png?width=150&height=320)
Google Pixel 4
Android 10.0
1. Find "SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-0a4625d8-81e1-4292-99be-3abc34a050da.png?width=202&height=426)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-ac53551d-8d93-48d2-8a1b-2eb383b335ac.png?width=202&height=426)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-177235f4-3de7-4189-b94a-7e59c51297c6.png?width=202&height=426)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-5488bcfa-d5ce-4972-a61b-8ae58f14ef01.png?width=202&height=426)
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-cc6487ee-f005-49e3-b65c-e22c016db2a8.png?width=202&height=426)
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-cdd65395-01cb-46dd-ab19-08fd25144d15.png?width=202&height=426)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-cc6487ee-f005-49e3-b65c-e22c016db2a8.png?width=202&height=426)