IMEI (International Mobile Equipment Identity)

IMEI (International Mobile Equipment Identity) is the International Mobile Equipment Identity code abbreviations, International Mobile Equipment identification number, is composed by 15 digit of "electronic string number", it with each handset one-to-one code is the world, and the only one. Each a mobile phone after completion of the assembly will be given a global only a group of number, this number from manufacturing to consign use will be manufactured manufacturers records.

introduction

International Mobile equipment identifiers (IMEI: International Mobile EquipmentIdentification by) symbol of Mobile devices is different, stored in a portable device, can be used to monitor theft or invalid Mobile device. IMEI composition as below, mobile terminal equipment through the type "* # 06 #" can check. Its chief for 15, each digital use only the 0-9 digital. Including TAC representative model by the European model, assembly code standards center distribution; FAC representative assembly factory number; For product serial number, used for SNR difference between the same TAC and FAC per mobile equipment; SP is spare coding.

IMEI commonly known as "string in cell phone number" storage EEPROM (known as yards pieces), familiar with and understand this number identification for our future mobile will play a very big effect. First TAC yards in different period before three can produce change, the past TAC yards in the first three now on cell phones won't appear. The past some old model phones are basically 446/448 beginning, like moto v328 nokia, and even the same phone 711bn in different period will have different TAC yards as everybody's most familiar 8210 upgrade, if top three owns 448902 cannot upgrade is different, because the CPU. Therefore the past said as long as is the same type of cell phone TAC yards that is not enough as must be exact, like again Ericsson mobile phone T39MC the same model in different regions of the place will also have different number: mainland, Hong Kong is HangHuo for 520406 for 520407. We know these differences can be through the TAC yards after "equipment identification", and don't bother to remember the IMEI's 7.8 digit represents the origin.

IMEI distribution

IMEI yards by GSM (global mobile communication association) unified distribution BABT (British communication, authorized by authentication management committee) judge.

IMEI composition

IMEI number by 15 composition, the composition for:

1, the first six digits (TAC, TYPE APPROVAL CODE) is "TYPE APPROVAL number", general representative models. 2, then two-digit (FAC - Assembly Code), immigration is "Final Assembly number", general representative origin.

After three and six digits (SNR) is "string of number", general representative external production.

4, finally 1 digits (SP) is usually "0" for inspection yards, currently temporary. Set aside.

IMEI code has uniqueness, posted on mobile phone, and on the back of the marks on cell phone memory read. It is this phone in the "archives" and factory id "."