How to tell if someone’s iPhone is on Do Not Disturb

Do Not Disturb mode was added to iOS way back in 2012, and has been a popular feature ever since. When activated on an iPhone (or iPad, for that matter), it silences all incoming notifications, calls and texts so you don’t get woken up or distracted when you need to be left alone. It’s useful for the person using the mode, but rather less enjoyable if you’re the one who can’t get through. If someone isn’t answering your calls

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