Here in the Crabitat, phones (cell or smart) are not allowed at the table. I know we’re somewhat unusual these days, but it has been a point here to dine together as a family. And that no cell phones rule went into effect when only my wife and I had cell phones. We also try not to answer the land line during dinner (that rule has a little more flex to it, but we usually tell the caller that we will call them back).
My youngest girl is the most active texter in the family – and she has taken the rule as a matter-of-fact family courtesy thing.
An observation: it used to be that someone talking to themselves out on the street was crazy. Now they’re bluetooth users.