Definition
International mobile equipment identity (IMEI) is an exclusive 15-17-digit code identifier for mobile devices. While each device has its own IMEI code, dual SIM phones often have two codes.
The IMEI codes are not linked to the SIM card so changing your phone number or using a different SIM card won’t change the IMEI code.
IMEI Format
IMEI takes the form of AA-BBBBBB-CCCCCC-D, which stands for:
- AA: Displays the Reporting Body Identifier of the device and points out the organization responsible for assigning the TAC (Type Allocation Code).
- BBBBBB: Shows the rest of the TAC digits used to identify the device model or type.
- CCCCCC: Represents the serial number of the mobile phone or device model being displayed in a serial sequence.
- D: Shows the algorithm used to verify ID number of a device.
Uses of IMEI
- IMEI number validation and details: IMEI code is used to verify the validity of a mobile device and check its origin, network, warranty status, and carrier details.
- Service provider blacklisting: Service providers use IMEIs to blacklist certain devices from accessing their network.
- Law enforcement and intelligence use: IMEIs are used by law enforcement agencies to track devices and aid in investigations of various crimes.