IMEI is a short abbreviation of "International Mobile Equipment Identity". Each and every Smartphone has different IMEI number.
Note – Changing your IMEI number is illegal in many countries. So, try at your own risk. I would request you all to take this tutorial for your knowledge only.
How to Change IMEI Number of Android Phone WITHOUT ROOT (MTK Chipset)
[bRequirements To Change IMEI Number of Android Phone ROOTED DEVICE
Change IMEI Number of Android Phone