1. Find "SIM Security"
Press the Navigation key.
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Select the settings icon.
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Select Network & Connectivity.
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Select SIM Manager.
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Select SIM Security.
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2. Turn use of PIN on or off
Select SIM PIN.
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Select the required setting.
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Key in your PIN and press the Right selection key.
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 Disconnect several times to return to the home screen.
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