1. Find "Set ‹SIM› lock"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2f135371-97ee-4552-8ab2-65e67f457b52.png?width=210&height=460)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-70c93b70-b0c8-44b7-a4f8-e0033eab689e.png?width=210&height=460)
Press More settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-8e15433c-8707-456b-b850-9dcd47365212.png?width=210&height=460)
Press Encryption and credentials.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-3f66ddb3-62b6-4fca-8ab7-af20dbbaacf1.png?width=210&height=460)
Press Set ‹SIM› lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-c31a1c28-21ab-476a-8ee9-2c1fc1799aa6.png?width=210&height=460)
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-04074c9a-fab6-4928-9ca9-f1dc7ae354e8.png?width=210&height=460)
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-6a7b0685-25aa-4a64-b95d-617569dba566.png?width=210&height=460)
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-04074c9a-fab6-4928-9ca9-f1dc7ae354e8.png?width=210&height=460)