1. Find "SIM PIN"
Press Settings.
![](http://wmstatic.global.ssl.fastly.net/ml/7020124-f-c8f381d6-0432-4545-849e-6b67d13b515b.png?width=336&height=448)
Press Mobile Data.
![](http://wmstatic.global.ssl.fastly.net/ml/7020124-f-6c04cd23-4b67-4464-bc57-f46e1820661b.png?width=336&height=448)
Press SIM PIN.
![](http://wmstatic.global.ssl.fastly.net/ml/7020124-f-8f74841e-763e-41fe-914d-acf337be067a.png?width=336&height=448)
2. Turn use of PIN on or off
Press the indicator next to "SIM PIN" to turn the function on or off.
![](http://wmstatic.global.ssl.fastly.net/ml/7020124-f-b745a1cc-9ba5-4d6f-a637-79b2b16242e6.png?width=336&height=448)
Key in your PIN and press Done.
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. You can get the PUK by calling customer services on 191 from a Vodafone mobile phone. If you're using a land line, you need to dial 03333 040 191. 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/7020124-f-6b50dca5-bc63-491b-80da-df84c5909a17.png?width=336&height=448)
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/7020124-f-b745a1cc-9ba5-4d6f-a637-79b2b16242e6.png?width=336&height=448)