This fellow’s grandmother doesn’t have a mobile device - she uses a telephone. I don’t see the value in making an older adult learn to use an entirely different technology when they just want to be able to call a taxi on their landlines.
She had a Windows Phone for years because you could zoom-in the tiles and thus increase touch targets for quick dialing. That eventually broke down, too, because of lack of haptic feedback and, well, we all can hardly imagine how hard it is to navigate a device like that when everything's so blurry you cannot see the space between huge-ass tiles on a, what, 6" screen or so.
