If your facing the problem of ads in between an important work in your phone, then check out the fix for the problem from the link given below
We need clean rom, that we deserve.
@Chandan it doesn't worked even I tried factory reset twice but after few days getting same problem
How to remove add on screen
@Chandan DOESN'T WORK!
Not only you I am also facing the same problem that I am trying to remove Ad in my cool pad device but after Kaspersky Customer Support help now I am able to know them all.
Mera coolpad mega 2.5d upgrade nahi ho raha hai