My mom has a Tecno H7 phone and just yesterday, the android.com.phone has stopped error message appears everytime she receives a call. I have tried resetting the phone to factory settings multiple times already, but still it does not work.
My last try after factory-resetting the phone worked, but when I open up play store, it updated apps, and then the error appeared again.
Also another thing that bothers me, is that there is a birthday gift icon appearing on the home screen and when you tap on it, it opens up an ad.
I have also read from another post here that you need to install a backup rom so I'll leave my email here.