Vodafone Czech Republic a.s.
The PIN and PUK codes are intended to protect your SIM Card from unauthorized use. The blocking of the card with the PIN code can only be overridden by the use of the PUK code. A card blocked by the PUK code cannot be unblocked; it cannot be used any further and you have to replace it.
We have set a default PIN 1234 for every SIM Card. We suggest that you change it. No one can ever find the changed PIN, as you enter it right into your telephone.
After having entered the PIN code incorrectly three times, the SIM Card gets blocked. When you enter the PUK code, you will unblock the card. You can find the PUK code on the little card from which you broke your SIM Card out. Rub off the grey field carefully.
You will also find the PUK code in the Internet Self Care. Select the option SIM Card under the Services menu and follow by clicking on Show about PIN and PUK. To enter the Internet Self Care, you will need the user password.
You have 10 attempts to enter the correct PUK code. After that, the card will be blocked entirely and you will no longer be able to use it.
After having entered the PUK code, the telephone will ask you to enter a new PIN. We suggest choosing a PIN code other than 1234. Subsequently, you will have to enter the new PIN once more, for verification.
If you enter the PIN code incorrectly three times, your SIM Card gets blocked and, at the next attempt, your telephone requests your PUK code. If you enter the PUK code incorrectly ten times, the card gets blocked for good.
With a DoubleSIM Card, the PIN and PUK codes are the same for both SIM Cards.