Whaddya think Hell is for???
We've been making a brief announcement before each meeting. I notice that they're referred to as "devices", so we don't seem to plug any mfr. 
That's a problem for sure. As you know, the vibration can be turned off, which means it's left on, which means they're ready to 'put God on hold if someone important calls'. And, it's sitting on the pew, so it has their focus.
Something like that came up in talking to a Catholic couple at the Senior Center. Someone mentioned that Mass attenders are sometimes sloppily dressed. I reminded them of the doctrine of the Real Presence. Doesn't matter if it's true or not, Catholics believe it is. So, how should a person dress for Mass? How about, at least as well as for a job interview with Jesus. And, turn off the phone!!!
In NYC, home of really cool people, they've had that problem at plays for years. Not to mention texting at meals.
Oh, well, the world has worse problems.