When I am on a call I cannot keep the active phone screen on top. The white screen with green characters remains up and I cannot respond to cues to press numbers for particular results.
Agree it is normal, are you looking to minimize that? If you want to go different screen swipe up if using gestures or tap home button if want home screen and then it will minimize to your notification panel or status bar
It's not the normal "live" screen. The actual live screen where you can do things like press numbers to make choices for answering systems will not stay on top. All I can get is the minimized version with no number pad.