You may notice that your device's IMEI has 17 digits instead of 15. Your carrier may add two extra digits to spot your device ...

No two IMEI numbers are alike, making it handy when identifying a specific device. On an Android phone, you can find your device’s unique IMEI number in your phone’s ‘About phone’ section.

IMEI is a unique 15-digit serial number that uniquely identifies a GSM or UMTS mobile phone. It consists of four parts and provides information, such as the manufacturer, to the mobile network.