Since the upgrade to iOS 6, I've been unable to access my mail on wi-fi, cellular or disconnected.
The symptoms are:
- The mail button icon shows '1'
- When clicking on te mail app icon, it attempts to open up the app, then it times out and goes back to the home screen
- When clicking on settings -> Mail, Contacts, and Calendars, the phone gets stuck and times out then goes back to the home screen.