![FAIRPHONE Fairphone 4](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-842a8f4c-ca94-4223-afa4-252e50c59ad8.png?width=150&height=320)
FAIRPHONE Fairphone 4
Android 11.0
1. Find "SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-ccb093df-1600-4ad1-9227-97bed8815943.png?width=200&height=432)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-cbf3eebc-40b8-49f7-bf04-45f69682db07.png?width=200&height=432)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-c42d0c5f-6a4c-4103-8d3a-288e441c552a.png?width=200&height=432)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-a2d3a752-c94e-4c2a-8be5-fe8ddb528ad0.png?width=200&height=432)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-df46f438-dfa1-43f4-93af-feb930b4505d.png?width=200&height=432)
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/7070823-f-9bde5adb-30b7-4a4e-b146-44972fc1c5f5.png?width=200&height=432)
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/7070823-f-5ff8d022-7f5f-4077-8091-15a38792150e.png?width=200&height=432)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7070823-f-9bde5adb-30b7-4a4e-b146-44972fc1c5f5.png?width=200&height=432)