We survived for years with a phone at home, not in a fist.  Today, it appears to any aliens watching us from space that we grow a little black (or red or green) box out of our hands as a certain age as we mature and becomes a part of our bodies.  
I'll never understand why any human MUST be in contact with some other human every waking hour.  Humans survived without such contact for milleniums (hahaha).  A phone is a tool, great to have when we need it, but we can actually turn it off or put it down occasionally and still function, not quite as important as a heart or lungs.