I have just noticed the Do Not Disturb feature since upgrading to iOS6, so I assume it came with that. How does it differ from Airplane Mode? I have been turning Airplane Mode on at night to block all incomings, but it has always bothered me that family could not reach me on the phone for emergencies during the night. Does DND block all noise and lights from email and texts? And is there a way to still receive phone calls? Thanks.