An International Mobile Equipment Identity (IMEI) number is a unique identifier for every mobile phone. It is used to track the phone if it is lost or stolen, and to identify the model and make of the phone. To check your IMEI number, simply dial *#06# on your phone. The IMEI number will be displayed on the screen.
It is important to know your IMEI number in case your phone is lost or stolen. If your phone is stolen, you can report the IMEI number to your carrier and they will block the phone from being used on their network. You can also use your IMEI number to track your phone if it is lost. There are a number of websites and apps that allow you to track your phone by its IMEI number.