What does a PUK code do? What is a PUK code

PUK code. It is a security password for the mobile phone card, and the SIM card is used to protect your safety.

PIN code is used.

and PUK code protection. When the PIN code is entered incorrectly 3 times, the SIM card will be automatically locked, and the mobile phone will prompt "SIM card locked";

If it is a Unicom mobile phone number, the PUK code can be queried in the following ways:

2.Call the local customer service on other machines, but you need a service password or verify the owner's information to query.

PUK is actually the abbreviation of PIN Unlock Key (Personal LDENTIFICATION NumberUnlock Key), and its main function is to unlock the SIM card when the wrong PIN code is entered, resulting in the phone being locked. Generally speaking, if the PIN code is entered incorrectly 3 times in a row, the phone will be temporarily locked and unusable. At this time, as long as you contact the system operator to which the mobile phone number belongs as soon as possible, and after passing the authentication process of identity verification, the other party will give you a set of PUK code, which can be unlocked as long as you follow the instructions.

1. The Puk code of China Unicom mobile phone card is an unlock code (a total of 8 digits long) used to decode the PIN code. PIN is a password used to protect the security of the SIM card, when the PIN code is entered incorrectly 3 times, the SIM card will be automatically locked, and you need to enter the PUK code to unlock it.

2. The PUK code of China Unicom mobile phone card can be queried in the following ways:

2. The owner of the aircraft shall go to the Unicom's own business hall in the place of belonging with valid documents to inquire about the PUK code information.

3. You have a total of 10 chances to enter the PUK code, more than 10 times, the SIM card will automatically start the self-destruct program, so that the SIM card is invalid, then you have to go to the business hall again to replace the card.

4. Each SIM card corresponds to a PUK code, and the PUK code of the SIM card will be changed after the card replacement business is handled.

In order to protect the user's safety, China Unicom SIM card is protected by PIN code and PUK code. The initial password of the PIN is 1234, when the PIN code is entered incorrectly 3 times, the number card will be automatically locked, you need to enter the PUK to unlock, you can check the PUK code in the following ways:

1. China Unicom online business hall: inquiry-basic business inquiry-my basic information;

3. View through the card tray of the USIM card;

4. Contact customer service or inquire through the business hall.

PUK is the PIN unlock code, which is the abbreviation of PIN unlock code, and its main function is the code used to unlock when the SIM card is entered incorrectly and the phone is locked. Generally speaking, as long as the PIN code is entered incorrectly 3 times in a row, the phone will be temporarily locked and cannot be used, and the card can be unlocked by entering the obtained PIK code.

The PUK code consists of 8 digits and cannot be customized by the user. When the mobile phone PIN is locked and prompted to enter the PUK code, the PUK code only has 10 chances to enter, and the SIM card will be permanently locked and scrapped if all the input errors are made. To obtain the PUK code, you need to contact the operator to which the mobile phone number belongs for identity verification, and after the verification is passed, the PUK code will be provided again, and the unlock can be completed according to the instructions.

Mobile phone encryption is actually to encrypt the SIM card of the mobile phone to ensure that the information of the SIM card is not accessed at will. Usually the SIM card contains two passwords, one is a PINI code and the other is a PINZ code. The PIN code is the main password to access the SIM card, and the PIN code often mentioned in the manual actually refers to the PIN code, which is an IPN code disclosed by the operator to protect the security of the SIM card.

The PINZ code is also the password of the SIM card, but it is used to set up network billing, realize call restrictions and other functions, and is related to the modification of the internal data of the SIM card. Because the PINZ code involves the use of some deeper functions, the operator does not disclose this password.

The PUK code is an unlock code (8 digits long) used to decipher the PIN code. When the PIN code is entered incorrectly 3 times, the SIM card will be automatically locked.

Tips: 1. You have a total of 10 chances to enter the PUK code, after more than 10 times, the SIM card will automatically start the self-destruct program to make the SIM card invalid, then you have to go back to the business hall to replace the card.

2. Each SIM card corresponds to a PUK code, and the PUK code of the SIM card will change after you replace the card.

Method used to release the TUK mobile card: When the user buys the card, the PUK code of some SIM cards is attached to the card, while the other part needs to be obtained from the network operator.

If the PUK code is locked and you don't know the PUK code, don't just enter it, because the PUK code only has 10 chances to enter, and if you enter it incorrectly 10 times, the SIM card will be permanently locked and scrapped.

At this point, the correct approach should be to call the SIM card operator's service**. With a simple user data check, it is possible to get a PUK code and unlock the phone lock. This service is free of charge.