![Samsung Galaxy A55 5G](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-59bd3e25-2562-405f-8705-8d392c66c9c0.png?width=150&height=320)
Samsung Galaxy A55 5G
Android 14
1. Find "SIM card security"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-7b0c5c87-2b48-47db-820d-ee99477a6549.png?width=210&height=454)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-66f927b2-6cb6-4f62-afa7-74015a2675f0.png?width=210&height=454)
Press Security and privacy.
![](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-721a62bb-5eea-45c2-9fc4-4a3b89303752.png?width=210&height=454)
Press More security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-9b5137d9-cb76-496a-b5dc-501b5d5892df.png?width=210&height=454)
Press SIM card security.
![](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-3c688e94-7039-4dc9-a81f-968473d72c3f.png?width=210&height=454)
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/7310524-f-2fe482c4-e394-48f2-a1cf-289ccc57908f.png?width=210&height=454)
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/7310524-f-d6c68617-d392-421f-ad9b-cbf49c097f08.png?width=210&height=454)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7310524-f-2fe482c4-e394-48f2-a1cf-289ccc57908f.png?width=210&height=454)