![Samsung Galaxy A03s](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-ef62aab4-d935-4f79-8491-109bc736d082.png?width=150&height=320)
Samsung Galaxy A03s
Android 11.0
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-b6fb8fe9-b1f6-400f-a590-dacd7a666614.png?width=198&height=440)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-7a799c1d-4c6b-4308-b02a-ecf3fc0b2bee.png?width=198&height=440)
Press Biometrics and security.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-469b9f8a-72eb-4248-80a7-5715f7dd379d.png?width=198&height=440)
Press Other security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-a8933e04-9432-47fb-9c83-aba69d824787.png?width=198&height=440)
Press Set up SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-8bed9e72-a63a-4deb-931c-0dbac600e4a6.png?width=198&height=440)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-2ea87af7-31db-4008-a9a9-00730b359484.png?width=198&height=440)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7151223-f-2ea87af7-31db-4008-a9a9-00730b359484.png?width=198&height=440)
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-22e62a7c-008b-4775-bb6c-826497554c30.png?width=198&height=440)
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-2ea87af7-31db-4008-a9a9-00730b359484.png?width=198&height=440)