Microsoft Lumia 640 XL
Find "settings"
Press the phone icon.
Press the dots in the bottom right corner of the display.
Press settings.
Turn use of PIN on or off
Press the indicator next to "SIM security" to turn the function on or off.
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 dialling 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.
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.
Key in your PIN and press enter.
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 dialling 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.
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.
Return to the home screen
Press the home icon to return to the home screen.