I started to experiment with going out without phones these days, for a few people it works great, all you need is to confirm the time and location.
But for some, somehow seems unworkable, the phone almost feels like a tool to be irresponsible so can "communicate" 🙈
If everyone can be reliable and show up on time, why do we even need to carry the phone around? I mean people in the past just write letters and meet, and it worked.