I can't hear any notifications
Ever since I updated to iOS 6, I can't hear any notifications besides texts and calls. For example, whenever I get a notification for Facebook, it only shows up on the screen. Same goes for other apps like Instagram, Twitter. Not even a vibrate. I checked my settings and all are set to sound. My silencer is off, ringer is up all the way, 'do not disturb' and airplane mode are off, each app's notification settings have the sound on, and vibrate is on for ring and silent. Music and videos work fine. Anyone else have this problem and/or know a solution to this problem?
iPhone 4S, iOS 6, Notifications silent