For the most part, assiduous commenting on a friend’s Facebook updates and periodically e-mailing promises to “catch up by phone soon” substitute for actual conversation. With friends who merit face time, arrangements are carried out via electronic transmission. “We do everything by text and e-mail,” said Laurie David, a Hollywood producer and author. “It would be strange at this point to try figuring all that out by phone.”

Of course, immediate family members still phone occasionally. “It’s useful for catching up on parenting issues with your ex-husband,” said Ms. David, who used to be married to Larry David, the star of “Curb Your Enthusiasm.” “Sometimes when you don’t want to type it all, it’s just easier to talk.”

But even sons, husbands and daughters don’t always want to chat. In our text-heavy world, mothers report yearning for the sound of their teenage and adult children’s voices. “I’m sort of missing the phone,” said Lisa Birnbach, author of “True Prep” and mother of three teenagers. “It’s warmer and more honest.”

That said, her landline “has become a kind of vestigial part of my house like the intercom buttons once used in my prewar building to contact the ‘servants quarters.’ ” When the phone rings, 9 times out of 10, it’s her mother.

There are holdouts. Radhika Jones, an assistant managing editor at Time magazine, still has a core group of friends she talks to by phone. “I’ve always been a big phone hound,” she said. “My parents can tell you about the days before call waiting.” Yet even she has slipped into new habits: Voice mails from her husband may not get listened to until end of day. Phone messages are returned by e-mail. “At least you’re responding!”

But heaven forbid you actually have to listen — especially to voice mail. The standard “let the audience know this person is a loser” scene in movies where the forlorn heroine returns from a night of cat-sitting to an answering machine that bleats “you have no messages” would cause confusion with contemporary viewers. Who doesn’t heave a huge sigh of relief to find there’s no voice mail? Is it worth punching in a protracted series of codes and passwords to listen to some three-hour-old voice say, “call me” when you could glance at caller ID and return the call — or better yet, e-mail back instead?