You can easily silence calls, alerts, and notifications on your iPad and iPhone using the iOS “Do Not Disturb” setting. This way, you can decide not to connect to the outside world without totally switching off your device. You can also schedule when you don’t want to be notified of phone calls, text messages, and app alerts.
To use Do Not Disturb, your Apple device must be running iOS 6 or higher and the Do Not Disturb must be enabled.
How To Enable “Do Not Disturb”
Tap Settings > Do Not Disturb. When Do Not Disturb is on, a “moon” icon will appear in the status bar. To make changes to your Do Not Disturb settings, tap Settings > Do Not Disturb.
If your device is running iOS7, you will see the additional settings below:
==> Manual: When enabled, calls and alerts received while the device is locked will be silenced.*
==> Scheduled: Automatically enable Do Not Disturb between the hours you specify.
==> Allow Calls From: Allow calls from everyone, no one, your favorites, or specific contact groups stored on your device or your iCloud account.
==> Repeated Calls: If someone calls you twice within three minutes, the call will not be silenced.
==> Silence: Choose to silence calls and notifications always or only when the device is locked.*