Biggest pain in the butt with Windows 10, such a basic function, you really would think they would work on the basics of the phone, rather than playing with apps, cummon Microsoft, get the basics first.
They already know all the hardware specs, manufacturers etc (there aren't all that many for mobile devices).
If they can make drivers work on a HUGE variety of computers, why not make them work on so few on mobile devices? It's only logical to walk before you can run.
It's the basic functions we want (and bought the phone for initially), why "tempt" us in, then screw us up after the first update.
Do Microsoft want customers or not ?