The mobile phone has several passwords. One is the service password, which is generally 6 digits by default, "000000" or the last 6 digits of the mobile phone number, and is used when logging on the website of the service provider to inquire about personal situation; One is the password of sim card (pin code and puk code), which is usually 8 digits by default to prevent the loss of mobile phone and telephone charges; There is also a screen lock password (also called pin code) to prevent outsiders from peeking at the contents of the mobile phone screen. Wait a minute.

First of all, we must find out what password the mobile phone wants, and then we can prescribe the right medicine.

If the pin code of the SIM card is entered incorrectly for three consecutive times, the SIM card will be locked and can only be unlocked if the PUK code is entered again. If the PUK code is entered incorrectly for 10 times in a row, the SIM card will be locked and you can only go to the service provider to redo a new card.

This setting of mobile phone SIM card is mainly to protect personal mobile communication business and prevent SIM card from being stolen by others, causing high expenses and unnecessary losses to users.

If you want to know your PIN code and PUK code, you can log in to China Mobile website with your mobile phone number and service password, and automatically enter the personal customer webpage. Then find "online business hall-inquiry service-personal information settings -SIM card information inquiry -SIM card information", and you can see the PIN1/PIN2/PUK1/PUK2 code of your mobile phone in it.

If it is a telecom card (number), you can log in to China Telecom official website with your mobile phone number and password, and find "self-service-convenience service-PUK code query", then you can see the PUK 1 code and PUK2 code of your mobile phone number.

Now many SIM cards have PUK codes on big cards.

In addition, there are many channels for electronic products to set PIN codes to protect personal information. There are generally two kinds of unlock pin codes: one is the unlock pin code of SIM card to prevent SIM card from being stolen by others and wasting your mobile phone fee; The second is to unlock the PIN code, which can also prevent others from accessing your mobile phone desktop at will and protect your personal information. In addition, there are other security PIN codes, such as the factory reset PIN code, which can prevent your mobile phone from being inadvertently restored to the factory state and losing your personal information, so when you want to restore it, you will be prompted to enter the PIN code to play a warning role. These codes can be the same or different. Generally, they are set the same, which is convenient for memory.

The default PIN code of a device is generally a four-digit password, and the default is "0000" or "1234" or "11". In order to prevent malicious detection from gaining access rights, the device sets the number of times of input (generally 3 times by default), after which the device can lock or require the input of pu. You can also set your own PIN code, so you must remember it after setting it, otherwise it will be very troublesome. You won't always forget your password. Go to after-sales service.

However, human memory is limited. Once you forget to lock the PIN code, the simplest, most direct and quickest way is to press and hold the power-on key+volume plus key at the same time in the shutdown state, and find the item "Restore factory settings" in the pop-up dialog box to enter the recovery. Select Simplified Chinese-Clear Data-Clear User Data and restart to enter the system. However, your software will be preserved, but the user data will no longer exist. This is also a small punishment for your bad memory.

You lost nine places, only the first eight, enter.