What does the imei code of Xiaomi mobile phone mean?

Imei (International Mobile Equipment Identification Code) is the abbreviation of international mobile equipment identification code, which is an "electronic serial number" composed of 15 digits, corresponding to each mobile phone one by one, and the code is unique in the world. Every mobile phone will be given a unique group number in the world after assembly, and this number will be recorded by the manufacturer from production to factory.

IMEI consists of 15 digits, as follows:

1 and the first 6 digits (TAC, type approval code) are "type approval number", which generally represents the model.

2. The next two digits (FAC- assembly code) are "assembly number", which generally represents the place of origin.

3. The last 6 digits (signal-to-noise ratio) are "serial numbers", which generally represent production sequence numbers.

4. The last bit (SP) of1is usually "0", which is a test code and is reserved for the time being.

SNR (serial number) code, that is, serial number, is also assigned by the manufacturer. Identify the devices in each TAC and FAC. The signal-to-noise ratio of each mobile phone will be different. Simply put, numbers can represent the order of the production dates of mobile phones. Usually, the larger the value, the later the model leaves the factory.

It is indeed possible that your second millet was actually produced before the first one, but it may not be, and there is not much concern about it. I hope you are satisfied.