This is also a good point. Once a week I'm on call after my normal working day until 9pm. I do usually go home as call outs are not too frequent, but have on occasion missed a call because I couldn't hear my phone in my pannier, got home and then realised and had to turn round and ride back to work!
Noooo!
I've only ever been called back to work once, and that was because a business owner in our building had lost their doorkeys, and were willing to risk leaving the main door open overnight.
So SPD's went back on, bike hauled back out and back on the road. But 30 minutes of my evening over x millions lost in data, hardware etc across our business is a small price to pay, plus helps me out.
I'll admit, you can miss things sometimes, but a call isn't one I miss. I turn the screen off once I've set the app, so it lights up when texts etc come in, but normally only calls get my attention as my focus is the road.
Btw, the mount is great, it holds the phone vertically on my stem, leaving the rest of the handlebar estate free for lights.