are you not getting an unlock prompt with your set unlock choice to come up when you push the home button regardless of the call display being normal or minimized? You can't use but a few things like the phone app, camera, calculator, flashlight, do not disturb etc while the phone is screen locked and most of those need to be the selected shortcut you've chosen to allow that. Allowing an individual to go to Google, and then Google something would require identifying personal information to be used and would violate your privacy rights even though it's you trying to do that. the phone doesn't know that until you enter the unlock code. two quick fixes for you so you won't have this issue anymore... 1, set your screen lock to none just know that anyone who picks up your phone would have access to the whole thing.. 2, download a caller ID app, there are hundreds of them and most are free, then let them tell you who's calling. if your thinking about the number, wanting to Google it to see if you want to answer it then... you probably should let the voice mail get that one.