Why not make a finger print sensor on the back for TouchID? And instead of using the thumb, you can use any finger that you feel most comfortable with holding it near that spot?
This way we can have a nicer looker phone with more screen space and touch ID which is cheaper (no special camera's and bionic chip is needed with a dedicated machine learning CPU) and works probably better even.
This way we can have a nicer looker phone with more screen space and touch ID which is cheaper (no special camera's and bionic chip is needed with a dedicated machine learning CPU) and works probably better even.