What does a mobile phone card PUK do, and how to check the mobile phone card puk?

PUK (PUK1) code full name PIN unlocking key, is the PIN code (PIN 1) unlocking code, PIN code (PIN1) is generally before the modification of the original password is 1234, or 0000, 4321, if not, don't try again, you need to call customer service ** consultation. Open the boot PIN code, just enter the PIN code every time you turn it on! If the PIN code is entered 3 times in a row and it is wrong, the card will be locked and required to be unlocked with the PUK code, and the PUK code has only 10 chances to enter, and if the 10 times are wrong, the SIM card will be permanently locked, that is, it will be scrapped.

In order to protect your security, China Unicom SIM card is protected by PIN code and PUK code. 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".

After the SIM card is locked, you need to enter the PUK to unlock it, you can log in to the mobile phone business hall and click "My Unicom", "Security Center", "My PUK Code", you can check the PUK code.

2. The specific functions and operation paths of the mobile phone business hall are subject to the actual page.

1. Unicom mobile phone card PUK code.

It 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.

Second, Unicom PUK code is used to decode PIN code.

The unlock code (8 digits long). The PIN is used to protect the SIM card.

Secure password, 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.

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.

Inquire for details.

Method 1: Obtain it on the back of the original physical SIM card, the back of the SIM card we gave when we first applied for a mobile phone number is a PUK code, and you can see it when you scratch off the coating.

The full name of the PUK (PUK1) code of the mobile phone number is PIN unlocking key, which is the unlocking code of the PIN code (PIN1). Its main function is the code used to unlock the SIM card when the wrong PIN code is entered, causing the phone to be locked.

The PUK code (PUK1) consists of 8 digits, which cannot be changed by the user. When the mobile phone PIN code is locked and prompted to enter the PUK code, do not operate at will, because the PUK code only has 10 chances to enter, and if the 10 times are incorrect, the SIM card will be permanently locked, that is, it will be scrapped.

The PUK code of some SIM cards is attached to the card when the user buys the card, such as the PUK code attached to the back of the mobile phone card sleeve of China Unicom, or China Mobile's Shenzhou Line, etc., while the other part needs to be obtained from the network operator.