Your iPhone has a special identification code called the International Mobile Equipment Identity (IMEI) number that can be used to find it if it is lost or stolen. Here's how to determine your iPhone's IMEI number:
Dial *#06#
Check the back of your iPhone
Check Settings
It's important to note that the IMEI number is used to identify your device and can be used to block a stolen iPhone from accessing cellular networks. The IMEI number can be used to determine whether an iPhone has been reported as stolen or lost when purchasing a used model.
Checking the IMEI number of your iPhone is a straightforward process that can be done in several ways. Whether you dial *#06#, check the back of your iPhone, go to Settings, or check iTunes, you should be able to find the IMEI number easily.