Quadlock my man. Everyone here is telling you to stow your phone in your pack and they are right. But if you really want a device in your cockpit, Quadlock is where it’s at. I keep my phone in my pack but I use an older phone (sim-less) as my GPS. Solid interface which has never popped off or come loose in over a decade of use. Placement is important as well, I keep mine over the stem to minimize damage if I eat it on the trail.
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Ditto on the Quad Lock.
I use my phone on my bike all the time.
In my early days (5 years ago), I did once damage my phones screen in a crash.
Never since. It certainly could happen but not likely the way the Quad Lock positions it.
I also do moderate riding and don't crash very often.
If you're hard core and crash a lot maybe not a good option.
I tried a bunch of the generic phone holders from Amazon and didn't like them nearly as much.
I noticed that for some phones, Amazon has knock-off Quad Lock cases that say they're as good as the original.
I would definitely by the original mount though.
Also, althought the Quad Lock case isn't too thick and could be used all the time, I prefer to use it only when I ride.
It takes 10 seconds to switch to my regular case.
Their customer support is excellent too. Although they're fairly robust, I have had some break.
The have on-line warranty support (forgot if it's 1 or 2 years) and you just fill out their form and send a picture and they send out a replacement part in days.