Why do mobile phones use headphones to listen to concerts and send text messages to the public?

For example, you have headphones plugged into your mobile phone now, so put it down for work.

But the headphones are still plugged into the phone. If the phone doesn't ring, aren't you going to miss it?

So will text messages.

In fact, it is to prevent the headphones from being taken down for fear of missing calls or text messages. This is the function of humanization.