1. Find "SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-caf28dfb-fff7-4cf9-ad5d-8845fd0a5408.png?width=204&height=442)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-cff0f046-5a2f-45f8-b412-1909a19229ac.png?width=204&height=442)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f226f4e9-5d37-44e7-8c22-70108e29bffc.png?width=204&height=442)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d29e129f-d55b-4a3d-9d09-cba5cdb6d006.png?width=204&height=442)
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/7140723-f-a014a788-5a1e-4047-9b9d-37275765be7b.png?width=204&height=442)
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/7140723-f-592ea966-f713-44cb-a10e-15eca00f5367.png?width=204&height=442)
3. Return to the home screen
Press the Home key to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-a014a788-5a1e-4047-9b9d-37275765be7b.png?width=204&height=442)