The GSMA maintains a unique system known as the International Mobile Equipment Identity Database (IMEI Db), which is a global central database containing basic information on the serial number (IMEI) ranges of millions of mobile devices (e.g. mobile phones, laptop data cards, etc.) that are in use across the world’s mobile networks. The IMEI is a 15-digit number that is used to identify a device on a mobile network.
The GSMA allocates official IMEI number ranges to all manufacturers of 3GPP compliant devices and records these ranges and device model information in the IMEI Db. The information recorded includes the manufacturer and model name of the device and its main network capabilities (e.g. frequency bands, radio interfaces and device types).