1. Find "SIM card security"
Slide two fingers downwards starting from the top of the screen.
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Press the settings icon.
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Press Security and privacy.
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Press More security settings.
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Press SIM card security.
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2. Turn use of PIN on or off
Press the indicator next to "Lock SIM card" to turn the function on or off.
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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.
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3. Return to the home screen
Press the Home key to return to the home screen.
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