1. Find "SIM security"
Press the Navigation key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6b3727a8-e044-4149-9a9f-537b6147390a.png?width=144&height=192)
Select Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c701e75f-15e3-42a0-8bed-7fdbfd4bf684.png?width=144&height=192)
Select Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-f4f99bec-f808-4238-af7f-8d7833cee2b7.png?width=144&height=192)
Select SIM security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-ea4d2731-1106-437f-8bc2-61c9201787e8.png?width=144&height=192)
2. Turn use of PIN on or off
Select PIN lock to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-190c6678-ad8f-4f63-9c6e-e95def0238ef.png?width=144&height=192)
Key in your PIN and press the Left selection key.
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-f76b6503-599c-4b95-aa69-5d09b7ebfdb1.png?width=144&height=192)
3. Return to the home screen
Press Disconnect to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-190c6678-ad8f-4f63-9c6e-e95def0238ef.png?width=144&height=192)