1. Find "Set ‹SIM› lock"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b044fe16-2c2c-4b87-964e-8c299d401988.png?width=208&height=444)
Press Security.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-afc02e30-0042-4c53-868e-fd3c4a180cd6.png?width=208&height=444)
Press More settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-b141f229-7f58-4ed8-a5e4-753c815ab148.png?width=208&height=444)
Press Encryption and credentials.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-6084f4bf-0652-4c81-9d3d-c12997a4d469.png?width=208&height=444)
Press Set ‹SIM› lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-deebb844-d5d5-4653-bd48-a5c94e679460.png?width=208&height=444)
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-bb634bcf-f49a-4724-8356-87885ab67b99.png?width=208&height=444)
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-45139306-0763-457d-8d1f-5e7bf8f98ed7.png?width=208&height=444)
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-bb634bcf-f49a-4724-8356-87885ab67b99.png?width=208&height=444)