iphone 4 with ios 6 update do not disturb isnt working
when i put the new ios 6 update on my iphone 4 the do not disturb update does not work
iPhone 4, iOS 6.1.2
Perform a Reset... Try again...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
http://support.apple.com/kb/ht1430
You use the Do Not Disturb setting while your iOS device is locked...
From Here > http://support.apple.com/kb/HT5463