1. Find "Set ‹SIM› lock"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-985dac77-368a-492b-9682-7a60edcd8e6b.png?width=208&height=450)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-68734128-d7ee-43a9-8f68-5d4a07e9e4ef.png?width=208&height=450)
Press More settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-5afaebf9-b7b4-41c3-b47b-8df4ef20f747.png?width=208&height=450)
Press Encryption and credentials.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-53052fcf-696a-4a30-a31b-a21aca80705c.png?width=208&height=450)
Press Set ‹SIM› lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6b37266a-8869-42dd-91a5-a2da1c4e6bdc.png?width=208&height=450)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9fc62e36-dbeb-4bf9-b123-69cbaf754f8e.png?width=208&height=450)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-9fc62e36-dbeb-4bf9-b123-69cbaf754f8e.png?width=208&height=450)
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-91659157-eeaf-4bb8-aa6a-511a2f995360.png?width=208&height=450)
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-9fc62e36-dbeb-4bf9-b123-69cbaf754f8e.png?width=208&height=450)