1. Find "SIM card security"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7200224-f-26750584-7e4c-4088-b863-acdf7a4d16d3.png?width=212&height=462)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7200224-f-5b1c0a9e-b9f1-4d88-9a2e-3345dbe4fdd0.png?width=212&height=462)
Press Security and privacy.
![](http://wmstatic.global.ssl.fastly.net/ml/7200224-f-11d6bf8e-8f87-47b2-8b83-2e93416386a9.png?width=212&height=462)
Press More security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7200224-f-83cd87b0-1bd1-4461-a42f-5955e1fe0375.png?width=212&height=462)
Press SIM card security.
![](http://wmstatic.global.ssl.fastly.net/ml/7200224-f-2a373126-0285-40fe-a3ed-628b9a60a009.png?width=212&height=462)
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/7200224-f-aaff1846-2e2f-43da-96b7-faa8f1a4832d.png?width=212&height=462)
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. The PUK can be obtained by contacting customer services. 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/7200224-f-3f70d57b-f83c-46c2-90d5-555fcd772c8a.png?width=212&height=462)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7200224-f-aaff1846-2e2f-43da-96b7-faa8f1a4832d.png?width=212&height=462)