I have an iphone 4 which i just upgraded to ios 6. Since the upgrade my alarms vibrate in addition to whatever sound I have set. I looked at my settings in 'sounds' and 'vibrate on ring' was already off. I turned off 'vibrate on silent' as well. It seems to make no difference. Am I missing a setting somewhere, is this a bug, or is this an intended "feature" that apple has added?