A free app for Android, by Nu-Kob.

If you’re looking for your Android device ID or IMEi, here is the perfect app for you. 

You will be able to copy and paste is to how you need the information. Aside from the device ID, it will also provide you with other information such as:- Android version- SDK Version- IMEI- Wi-Fi Mac Address- Sim Serial- Phone Number (some sim card)- Signal Strength (update every second)- Technology (update every second) such as HSPA, HSPA+, EDGE, GPRS, LTE, HSUPA, HSDPA, CDMA- Manufacturer- Device Model

This is the information about your device which can be found on the same page as the device ID.