What is the PIN code of the SIM card?

The pin code is the personal identification password of the sim card. The PIN code of the mobile phone is a security measure to protect the SIM card and prevent others from stealing the SIM card. If the power-on PIN code is enabled, a 4-digit PIN code must be entered every time the phone is turned on. Function of pin code The pin1 code is a personal identification code. It is a storage unit inside the sim card and is set through the mobile phone. When turning on the phone, you will be asked to enter the pin1 code. Entering the pin1 code incorrectly three times will result in a "card lock" phenomenon. At this time, the operator needs to provide the PUK code and enter it on the phone keyboard to unlock it. If you enter the PUK code incorrectly 10 times, the card will be "burned". You must bring the valid ID of the machine owner to the business hall of the operating network to get a card replacement. The role of pin codeThe pin2 code is used when setting mobile phone billing. If you enter incorrectly three times, the phone will need to be unlocked with the PUK2 code. The process is the same as the pin code and PUK code introduced previously. However, these two passwords are related to network billing and modification of the internal data of the SIM card, so they will not be disclosed, and even if the pin2 password is locked, it will not affect the normal use of the phone. Therefore, there is no need to pay attention to pin2 code and PUK2 code. The phone's pin code is a security measure for the SIM card to prevent others from stealing your SIM card. When you enter the wrong pin code three times, the phone will be automatically locked. At this time, you need to use the PUK code to unlock it. This PUK Please consult your SIM card service provider. If you enter the wrong PUK code ten times in a row, your SIM card will be burned and scrapped. Of course, you can go to the SIM card service provider, that is, the lobby of China Mobile or China Unicom, and ask them to help you solve it.