The IMEI (International Mobile Equipment Identity) number is a unique 15-digit serial number for identifying a device; every mobile phone in the world has one.

These IMEI numbers are stored in a database called the EIR (Equipment Identity Register), which contains information about all valid mobile phone equipment. This is because the EIR’s job is to check that every phone call or SMS sent is from a mobile phone authorized to use a mobile network, which it does using the IMEI number.

Therefore, if you have a working mobile phone connected to a mobile network, your phone is already registered.

The IMEI number reveals details about a phone without having to physically have it, including the brand and model, year of release, and other specifications.

For this reason, your insurance company or new phone provider may want to know your IMEI number to create an insurance policy. Your new mobile operator may need it to unlock the device from your old provider.