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-49f60437-adb5-40ef-9479-04d8f43a628c.png?width=198&height=438)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9fd1f528-028d-4a03-b872-de91b0054e96.png?width=198&height=438)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-91e72fa8-56be-422c-aa5c-34d33cf8fecb.png?width=198&height=438)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-dd823380-c75f-4900-b6b1-a0280e4f91df.png?width=198&height=438)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c31f19ed-6dda-453d-81c0-c4839bbabd28.png?width=198&height=438)
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-44f24d71-c526-41bc-a07c-c712cd355197.png?width=198&height=438)
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-63e62038-265a-4bcd-9236-9e8661ac78c0.png?width=198&height=438)
3. Return to the home screen
Slide your finger upwards starting from the bottom of the screen to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-44f24d71-c526-41bc-a07c-c712cd355197.png?width=198&height=438)