Yon don't need to use Mtk engineering mode or mobile uncle long process, this app makes things easier for you. Another great feature is that it can fix invalid or null IMEI by generating the imei for your device randomly.

This app can change any stubborn mtk devices imei number so you don't need to worry any more, this is the best solution to tweakers and the simplest and fastest way of changing imei of any mtk android devices

Source: http://www.ufarblog.com/2015/08/new-method-to-change-any-mtk-android.html

doesn't work that way ya know..... I'm not sure you know how it works

ARCUS:
doesn't work that way ya know..... I'm not sure you know how it works

am using it to tweak imei dt is y i share it