1. Find "SIM card lock"
Slide two fingers downwards starting from the top of the screen.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-d0310aab-55d7-4c46-b4c5-d08f2f15f264.png?width=196&height=392)
Press the settings icon.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-e4c8adee-fe29-4bed-96d1-aefcfb4c510c.png?width=196&height=392)
Press Security & location.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-93f75d07-9262-48ac-a445-903a476b10a0.png?width=196&height=392)
Press Advanced.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-286a4707-1e81-4e4f-b4bc-59508e2d3ffe.png?width=196&height=392)
Press SIM card lock.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-2c41ad39-15a6-42f9-b15c-ca9506caa803.png?width=196&height=392)
2. Turn use of PIN on or off
Press the required SIM.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-720a9410-da36-475f-8854-666fcfa0aba6.png?width=196&height=392)
Press the indicator next to "Lock SIM card" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7140723-f-720a9410-da36-475f-8854-666fcfa0aba6.png?width=196&height=392)
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-4c9c1e01-c3ee-4ef3-97df-2cdc1c474c03.png?width=196&height=392)
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-720a9410-da36-475f-8854-666fcfa0aba6.png?width=196&height=392)