What is device ID in Android phone?

The android device ID is a unique alphanumeric code generated for your Android phone when you first set it up. This code basically identifies your device similar to how IMEI number works. However, Android device ID is specifically used for identification purposes, instead of tracking your device.

Where is Device ID on phone?

If you’re on an Android phone, it’s just as simple:

Go to Settings > About Phone. Your phone ID (IMEI) should be one of the first things you see.