Security and privacy
PUK
Abbreviation for Personal Unblocking Key
In short and in plain language
The PUK is a number code for the card in your mobile phone.
If you type in the secret number wrongly too often, the card gets locked. This code unlocks it again.
The code is usually printed on the card holder. You get it when you buy the card.
Definition
The PUK is a numeric code belonging to the SIM card of a mobile phone. It unlocks the card after the PIN has been entered wrongly too often. It is usually printed on the card holder you receive when buying the card.