When enabled, Do Not Disturb quiets all audible notifications and keeps the screen dark as well. Yes, the notifications are still coming in, and if you manually turn the screen on, you can see them. But left alone, the phone will give you a break from the online world. There are two ways to use Do Not Disturb.
When you call a dead phone does it ring?
Answer: A: With a dead battery it should not ring but it should go to voicemail directly.