What is the use of mobile phone serial number?

Mobile operators can distinguish user equipment by mobile phone serial number, track users' geographical location, and record users' behaviors such as calling, texting and surfing the Internet.

Imei (International Mobile Equipment Identification Code) is the abbreviation of International Mobile Equipment Identification Code, which is equivalent to the ID number of a mobile phone. The code is unique in the world and cannot be changed.

The IMEI code is pasted on the sign on the back of the mobile phone (also stored in the mobile phone, and can be obtained by pressing "*#06#" on the mobile phone), and read and write in the memory of the mobile phone. It is the "file" and "ID number" of the mobile phone at the manufacturer, which is used for identification in GSM mobile network.

Extended data:

International Mobile Equipment Identity (IMEI), commonly known as mobile phone serial number and mobile phone serial number, is used to identify every independent mobile phone and other mobile communication equipment in the mobile phone network, which is equivalent to a mobile phone ID card.

The serial number * * * has 15 digits, and the first 6 digits (TAC) are the model approval number, which represents the mobile phone type. The next two digits (FAC) are the final assembly number, representing the country of origin. The last 6 bits (SNR) are the serial number, which represents the production serial number. Finally, 1 bit (SP) is generally 0, which is a check code and reserved.

The international mobile equipment identification code is generally attached to the back of the fuselage and the outer packaging, and also exists in the memory of the mobile phone. Enter *#06# to query.

IMEI is an identifier to distinguish mobile devices, which is stored in mobile devices and can be used to monitor stolen IMEI or invalid mobile devices. IMEI is printed on the logo on the back of the phone body, and read and write are stored in the phone memory.

References:

Baidu encyclopedia-mobile phone serial number