Calendar not working after upgrade to iOS 6
After updating my iPhone 4s to iOS 6 last night the calendar is broken for want of a better word. Adding iCloud, Exchange or Gmail calendars does nothing. I can only occasionally try to add an event (most of the time the + symbol is missing). If I get to that point it doesn't keep the name of the event and then crashes.
I tried a hard reset and then resorted to a restore but the same issues persisted. I can set the calendars to on in settings but nothing will make them appear in the calendar.
I also can't add my exchange account at all. It verifies and then disappears.
Any ideas? My iPad 2 is fine!
iPhone 4S, iOS 6