![Google Pixel 4a 5G](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-0bd076e2-1681-469e-898e-132c1bc731ea.png?width=150&height=320)
Google Pixel 4a 5G
Android 11.0
1. Find "Change SIM PIN"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-6931f341-63a4-4506-9e03-fdac9749ff73.png?width=206&height=450)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-f4b974ae-81d7-4050-a19f-8679a7cce2ab.png?width=206&height=450)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-390e43a4-4e68-4fa9-94d0-c3893b777fa4.png?width=206&height=450)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-e74d176e-0932-42f7-9126-70491ef6ae43.png?width=206&height=450)
Press Change SIM PIN.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-c95598b4-1cbd-434c-8a57-71bd740d021f.png?width=206&height=450)
2. Change PIN
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-c5d07be7-86d5-4b4f-a9de-1d95ba7d4294.png?width=206&height=450)
Key in a new four-digit PIN and press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-85809acc-c6f7-4545-ae1a-d3d74c224424.png?width=206&height=450)
Key in the new PIN again and press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-45a8a4c2-7d9d-4c75-9ce4-e57dd2457db8.png?width=206&height=450)
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-c95598b4-1cbd-434c-8a57-71bd740d021f.png?width=206&height=450)