I have turned off all notifications, no sound on my phone either. If I happen to look at the phone while someone is calling, good - otherwise I'll call them back or write them.
That's a really interesting strategy. Thanks for the tip. What about emergency calls? But then I just realized, those are extremely uncommon.
> Under 'What can interrupt Do Not Disturb', tap People: Calls: Repeat callers. To let a call through if the same person calls twice in 15 minutes, turn on Allow repeat callers.