The label containing the barcode, number and model number is the International Mobile Equipment Identification Number (IMEI), which is usually called the serial number of the mobile phone. It is used to identify every independent mobile phone and other mobile communication equipment in the mobile phone network, which is equivalent to the mobile phone ID card.
During the warranty period, the merchant may ask for the serial number of the mobile phone, so that if there is a problem with the machine, it can be easily repaired or replaced. Tearing off may affect the warranty, and tearing off is not recommended.
Extended data:
How to understand the meaning of mobile phone serial number
1, TAC, type allocation code, which consists of 8 digits (6 digits in the early days), is a code to distinguish the brand and model of mobile phones. This code is allocated by GSMA and its authorized institutions.
2.FAC, the final assembly code, consists of 2 digits. In the early TAC code, only 6 digits existed in the mobile phone, so TAC and FAC codes add up to 8 digits. FAC codes are used to distinguish the production within the manufacturer.
3.SNR, Serial Number, serial number, consisting of 6 digits starting from the 9th digit, is used to distinguish the production serial number of each mobile phone.
4. The 4.CD, parity bit and verification code are calculated by Luhn algorithm from the previous 14 bits.
5.SVN, software version number, software version number, distinguishes different software versions used by the same model of mobile phone when it leaves the factory, and only exists in some models of some brands.
References:
Baidu Encyclopedia-International Mobile Equipment Identification Code