[5g NR] mobile phone ID number IMEI and imeisv

Catalog

IMEI And IMEISV brief introduction

IMEI Format changes

IMEI The composition of

IMEISV The composition of

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IMEI And IMEISV brief introduction

   Usually we buy mobile phones , There will be two labels , One label is the access license , Stick it on the back of the phone , Another label may be attached to the back of the phone , It may also be on the outer packaging , This label with bar code identifies IMEI.

   On the phone “IMEI” Means the international mobile device identification number （IMEI）, It is usually called mobile phone serial number . It is used to identify individual mobile phones and other mobile communication devices in the mobile network , It's equivalent to mobile phone ID number , It's the only one in the world .

   On the phone “IMEISV” Medium SV Means mobile ID card “IMEI” The software version of . With “IMEI” Update , The version value also changes , It is convenient for the internal identification of the manufacturer .

   About IMEI Inquire about , Input *#06# It can be inquired directly , It can also be managed in the system -> About mobile phone -> The status information is queried IMEI. If it is a single card mobile phone , only one IMEI, If it's a dual card phone , There are two IMEI.
 

IMEI Format changes

about 03 Mobile phones years ago ,IMEI by TAC + FAC + SNR + SP, Its composition is :

• front 6 digit (TAC) yes " Type approval number ", Code representing the brand and model of the mobile phone .
• And then 2 digit (FAC) yes " Final assembly number ", Code representing the final assembly site .
• After that 6 digit (SNR) yes " Serial number ", Represents the production sequence number .
• Last 1 digit (SP) Usually "0", For the check code .

03 In five years' time TAC and FAC Merged into a new 8 position TAC, To this day . Let's have a look IMEI and IMEISV The Agreement constitutes .
 

IMEI The composition of

IMEI by The International Mobile station Equipment Identity abbreviation , International mobile device identification number , Its composition is shown in the figure .

IMEI structure

IMEI It consists of the following elements （ Each element consists of only decimal digits ）：

• Model approval code （TAC）, The length is 8 digit ;
• Serial number （SNR） It's a unique identity TAC A single serial number for each device in the , The length is 6 position ;
• Check bit （CD）/ Alternate number （SD）： If it is a check digit , adopt Luhn Algorithm , You can work out IMEI Whether the number is correct ; If it is a spare number , It's in MS It should be set to zero during transmission .

IMEISV The composition of

IMEISV by International Mobile station Equipment Identity and Software Version Number abbreviation , International mobile device identification number and software version number , Its composition is shown in the figure .

IMEISV structure

IMEISV It consists of the following elements （ Each element consists of only decimal digits ）：

• Model approval code （TAC）, Its length is 8 digit ;
• Serial number （SNR） Is the unique identification of each TAC A single serial number for each device in the , Its length is 6 digit ;
• Software version number （SVN） Identify the software version number of the mobile device . Its length is 2 digit .

IMEISV Follow IMEI The only difference is that the last one ,IMEI Yes 15 position , And then finally CD/SD, Inspection bit ;IMEISV Yes 16 position , Removed CD/sd, Plus two SVN.