“We first started talking about mobile phone etiquette in 2010, 2011, and the problems were nowhere near what we are getting today,” says Liz Wyse, an adviser at Debrett’s, the authority on British etiquette. Do you mind, for instance, if someone you are talking to lowers their eyes momentarily to look at their phone? What about using their phone at the dinner table? Is it OK for you and your partner to scroll while you watch TV together? How many of us can say honestly that we never use the phone in the bathroom?I spoke to countless people about their mobile phone usage while writing my novel Speak to Me, which features a woman so enraged by her husband’s attachment to his phone that she regards it as the third party in an increasingly high-stakes love triangle. Weddings are trickier: “The moment a person gets the phone out to take a picture, they see a message and will be tempted to look