Cell phones have several passcodes.
One is the service password, the default is generally 6 digits, \"000000\" or the last 6 digits of the mobile phone, login service provider website to inquire personal information used; One is the sim card lock card password (pin code and puk code), the default is generally 8 bits, to prevent the loss of the phone, resulting in the loss of phone charges when used; There is the lock screen password (also called pin code), the default is generally four 1234 or 0000, to prevent outsiders from peeking at the content of the phone screen; There are other security passwords, such as the restore factory Settings password, and so on. We have to figure out what code the phone wants, and then we can treat it. First, the pin code of the SIM card will be locked 3 times, and can only be unlocked by entering the PUK code, PUK code is entered 10 times, the SIM card will be locked, and can only go to the service provider to redo the new card (electric signal to do the new card fee of 20 yuan). This setting of the mobile phone SIM card is mainly to protect the personal mobile communication business, to prevent the SIM card from being stolen by others, resulting in high costs, and causing unnecessary losses to users. If you want to know the PIN code and PUK code, you can log in to the China Mobile website with your mobile phone number and service password, and automatically enter the personal customer webpage.
Then find \"My mobile - all categories (put the mouse on it) - other functions -SIM card information query\
If it is a telecom card (number), you can use your mobile phone number and password to log in to the official website of China Telecom and find the \"Consumer help center (in the top right corner of the screen) - convenience service - convenience service - real PUK code query - Enter the mobile phone number in the box to display the PUK code\" is generally two, the first is PUK1 code, the second is PUK2 code. Many SIM cards now have the PUK code on top of the big card. Electronic products have multiple channels that require a PIN password to protect personal information. There are generally two unlock pins:
First, the unlock PIN code of the SIM card, which is generally a four-digit code, and the default is generally 1234.
It is mainly to prevent the SIM card from being stolen and used by others to waste your mobile phone fee;
The second is the screen PIN, which also prevents others from accessing the mobile desktop at will to protect your personal information.
In addition, there are other security PIN codes, such as the phone to restore factory Settings PIN code is one of them, the default is generally six zeros.
It prevents you from inadvertently restoring your phone to factory condition and losing your phone's personal information, so it prompts you to enter a PIN code when you want to restore it, so as to act as a warning.
These codes can be the same or different, and are generally set to the same for ease of memory. The default PIN code of the mobile phone SIM card is generally a four-digit password, the default is \"0000\" or \"1234\" or \"1111\". In order to prevent malicious attempts to obtain access, the device sets the number of input times (generally the default is 3 times), after which the device can lock or require the input PUK code (which is a higher eight-digit password).
The PIN code can also be set by itself, and it must be remembered after setting, and once forgotten, it is generally necessary to find after-sales treatment.
4. Here is a solution l after the lock screen PIN code is forgotten: press and hold down the power button at the same time in the shutdown state, and find the item \"Restore factory Settings\" in the pop-up dialog box to enter recovery. Select Simplified Chinese - Clear Data - Clear user data and restart the system.
The phone's apps will remain, but the user data will be gone. Note: The Sim card pin has a limit on the number of times, the correct input can be used indefinitely, once the input is wrong for three times, even if the correct PIN code is found, the re-input will prompt an error, or even no error, directly to the PUK code input.
Therefore, when the operation must pay attention to the number of times, do not not pay attention to the case, enter the PIN code error three times, and then continue to enter the error ten times, the card burned.
Other pins generally have no number limit.
SIM card PIN is used to protect the security and privacy of the SIM card. When the mobile phone is restarted or the SIM card is inserted or removed, you need to enter the most correct SIM card PIN code to use the SIM card communication function (making calls, sending and receiving short messages, etc.). If you fail to enter the SIM card for three times, the SIM card will be locked, and you need to enter the PUK code to unlock it. You need to use the service password to call the operator's customer service hotline, the customer service will tell you the initial PUK code, after entering the PUK code will unlock the PIN.
The PUK code is entered for 10 times. If the PUK code is entered incorrectly for 10 times, the SIM card will automatically start the self-destruct program to disable the SIM card.