1. Find "SIM security"
Press the Navigation key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-520c9bf2-ef91-44be-8619-f67c09f08317.png?width=200&height=150)
Select Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8aefb40a-6e41-4c1d-a97e-0c106fe7ab21.png?width=200&height=150)
Select Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-7110a5b1-828c-4e4c-a325-2742e2dd08c0.png?width=200&height=150)
Select SIM security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-84ea7e55-a4b6-41ff-bc3d-f52643200b91.png?width=200&height=150)
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-9a5fb73c-ac25-4a0e-875b-3e40dfe55e1f.png?width=200&height=150)
Key in your PIN and press the Navigation 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-aa327b24-7353-49e5-a8f4-43bb54b1392b.png?width=200&height=150)
3. Return to the home screen
Press Disconnect repeatedly to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9a5fb73c-ac25-4a0e-875b-3e40dfe55e1f.png?width=200&height=150)