The “Do Not Disturb” feature in iOS can be very useful for keeping your iPhone from bothering you with notifications at inappropriate times, such as when you’re in a meeting or while you’re sleeping. By default, however, notifications are only suppressed when you’re not actively using your device – that is, when the screen is off and the device is basically in sleep mode.
However, if you’d prefer to keep your iPhone, iPad, or iPod touch silent at all times when Do Not Disturb is enabled, you can find a setting tucked away at the bottom of the Do Not Disturb section in the Settings app that will suppress all notifications.
Simply select “Always” in the “Silence” section and all alerts will be suppressed, even the banners and pop-ups that come up while you’re using your device. You can still find these hidden alerts in your Notification Centre, but you won’t have them getting in your way or making your device vibrate or make noise.
This can be handy when you’re using your device in a very quiet environment, or even if you simply want to play a game without risking alert banners popping in from the top and distracting you..