How does the Android phone look at the IMEI number?

1 in the Android phone interface we only need to click on the "Standby interface" and then click "Phone", then we find the "dial-up interface" Input "* #06 #" input, as shown in the figure:

2 and then you can see the Android phone IMEI number, as shown in figure:

All right, actually, all the Android phones look at the IMEI code in the same way. Oh, my friends can look at it. But the iphone will be different because it's a separate system.

What is IMEI?

IMEI (International Mobile Equipment identity, international identification code for mobile devices, also known as the International Mobile device identification) is the only identification number for the mobile phone. We analyze its meaning from the full name of the abbreviation:
"Mobile devices" are mobile phones, not including laptops.
The word "international" also shows that it is recognizable globally, that IMEI does not repeat globally.
The "identity" surface of its role is to identify the different mobile phone, a machine a number, similar to the person's ID number.
The word "Code" also indicates that it is a serial number, often called "serial number", "Electronic serial number" of mobile phone.
When the cell phone is in production, it is given a imei.