A Personal Unblocking Key
(PUK Code) is a unique number that's used to unlock the Subscriber
Identity Module (SIM Card) for your phone. The SIM Card contains all the
account details your phone needs to make and receive calls---including
generated passwords (PIN Codes.) If you forget or loose that password,
you can use the PUK Code to unlock the SIM Card. You will be prompted
for the PUK Code if you enter the PIN Code incorrectly three times on
your phone. You can get your PUK Code from your carrier. it is not possible to unblock the sim without your puk.
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