1. Find "SIM security"
Press the Navigation key.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9eea8af1-64d7-4fde-be2e-9272c857e24a.png?width=138&height=184)
Select Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-65d50d1c-62f2-432a-a5eb-b36291702724.png?width=138&height=184)
Select Security settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2ce0a749-b7ac-4218-b567-731929c2d182.png?width=138&height=184)
Select SIM security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-abbde6be-0fee-46d4-ad94-264a9b6aa1b9.png?width=138&height=184)
2. Turn use of PIN on or off
Select PIN lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0f296bfe-f11a-4152-86da-0d570a44c132.png?width=138&height=184)
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-c811c34d-59d0-45d0-8912-c77c2cb8f626.png?width=138&height=184)
3. Return to the home screen
Press Disconnect to return to the home screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-0f296bfe-f11a-4152-86da-0d570a44c132.png?width=138&height=184)