hello..I had the same problem.Think i know what is this ****...Did you root ever your devices???Downloaded sometime usb drivers??This virus beats only mobile devices,never pc..If you erase data of internet provider,will change popup[advertising] and shows another popup[advertising in browser]...I did unroot,factory reset,[no cache only] and unloaded from my device.When i did again root with same method and same drivers,again the same problem on my device...So???Chinese method root and chinese usb drivers...Avast Norton avira...do not detect this..Adware is..no virus...sorry for my english