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What is the use of mobile phone serial number?
Mobile phone serial number, also known as IMEI number, is the abbreviation of international mobile device identity, just like mobile phone ID card, which is used to help identify the authenticity of mobile phones. Each mobile phone has only one serial number, which will not be the same. Generally, the serial number displayed after pressing the "*#06#" key on the mobile phone corresponds to the barcode on the mobile phone packaging box and the serial number inside the mobile phone after the back panel is removed. If the three are the same, it is more likely to be genuine (second-hand licensed goods are not excluded).

In addition, we can distinguish genuine products from parallel imports by looking at the IMEI code, which generally consists of 15 digits. The format is as follows:123456-78-901234-5. However, the first two digits of the mobile phone serial number are 35.

123456 = type approval code, abbreviated as TAC code (equipment type approval number).

The first six digits of IMEI code are TAC code. TAC code represents the model of mobile phone. Whether Panasonic, Samsung or Motorola products, as long as they are the same model of mobile phones, the TAC code must be the same. Try to compare several machines. If the TAC code of the same model is different, there must be fakes.

78 = assembly code, FAC code for short, (assembly number).

The 7th and 8th digits of IMEI code are FAC codes, which refer to the factory where the mobile phone is finally assembled. Each factory has its own special code, so it is not a code made in any country. However, we are generally used to taking the factory that completed the final assembly process as the origin of mobile phones. Therefore, the FAC code can also be considered as the code of the origin of the mobile phone. We can use it to identify the authenticity of licensed and parallel mobile phones. Generally speaking, the assembly point of mobile phones in China is in China, so as long as the final assembly point is in China, it is generally positive. The IMEI78 of Panasonic mainland licensed Beijing-made mobile phone is: 62. Similarly, you can determine the final assembly point of parallel imports by looking at this. Is it the European Water Bank, the Hong Kong Bank or the Malaysian Bank?

90 1234 = serial number, abbreviated as SNR code, (factory serial number).

The 9 ~ 14 bits of IMEI code are SNR codes, which are the factory serial numbers of mobile phones. The factory serial number of a mobile phone, like that of other products, serves the internal management of the manufacturer. Every mobile phone has a different signal-to-noise ratio code. If two mobile phones are the same, one of them must be fake.

5 = standby number, abbreviated as SP code, (standby number).

The last bit of the IMEI code, namely the SP code, is the standby number of the mobile phone, which is generally zero. However, it is normal that the SP code of some mobile phones is not zero.

However, times have changed, and the European Type Certification Center responsible for IMEI certification redistributed IMEI last year. The FAC codes of mobile phone serial numbers 7 and 8 are merged with the TAC codes of the previous 6 digits, and the number of FAC codes starts from 00, so no matter what model or brand, its 7 and 8 digits are 00, such as the latest C289, Samsung V200, Siemens A55, Sony Ericsson T6 10. So in the case that the 7th and 8th places are both 00, it may not necessarily mean what we said above.