iPhone vibrates in spite of "Do Not Disturb" When i switch my iPhone 5 (iOS 7) to "Do Not Disturb"-Mode, and also activate "Always" in the Silence-Settings, it vibrates when it is unlocked.


  So when i am reading an iMessage, and it arrives a new one, my iPhone
  vibrates.


I want to switch my iPhone completely silent with this option, but it is really possible? I can turn off vibration, of course, but i really don't know what Do Not Disturb really does!

It turns of Vibration and Sound when new Notifications arriving, but when i am using the Phone, it should be complete silent as well.


  Is this a bug or just a missing feature?
It's my understanding that this is by design. 

Do Not Disturb mode is meant to be active when the phone is not actively in use. The idea behind it is that, if the phone is unlocked and you are working with it, you do in fact WANT to be notified of a new item. 
However, when the phone is locked and dormant, the logic is that you no longer wish to be disturbed, and it will suppress vibration / notification indicators.

So for example, if you are sleeping, and DND is on, then it will remain silent, and not vibrate. If you roll over, pick up your phone to check messages, and it's active, the DND will still allow vibrate to indicate new messages while you are using it.