![Samsung Galaxy A71](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-cb0ba8a2-5251-4612-8313-671b95372941.png?width=150&height=320)
Samsung Galaxy A71
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-f9a27398-50e0-4249-b93b-c0c70a2f7373.png?width=204&height=452)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-948bf70b-c752-4c48-8134-2495e9fdf7c6.png?width=204&height=452)
Press Biometrics and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-29a77264-78d3-440a-a50b-5ea88f0220aa.png?width=204&height=452)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-003dc7a9-1a0f-4e07-b28c-9012b8e3d420.png?width=204&height=452)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-cf485052-6474-46dd-a57c-c2d255bdfd69.png?width=204&height=452)
2. Change PIN
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-466005f6-45a2-4f53-b768-44647060e91b.png?width=204&height=452)
Press Change SIM card PIN.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-466005f6-45a2-4f53-b768-44647060e91b.png?width=204&height=452)
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-53cfa983-0079-4235-b1f0-2b45c2f5f7dd.png?width=204&height=452)
Key in a new four-digit PIN and press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-db7bd71a-7e05-4f88-b09f-f560df599576.png?width=204&height=452)
Key in the new PIN again and press OK.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-df59bf22-eb0c-4be5-8f45-1b9ac9232007.png?width=204&height=452)
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-466005f6-45a2-4f53-b768-44647060e91b.png?width=204&height=452)