I'm on iOS 8.0.2 on the iPhone 6. In mail settings, when I change any information (default account/signature etc) and return back to the settings screen, the settings revert back to what they were originally! For example, when I edit my signature to 'Thanks', and click back to the mail settings menu, the signature appears as 'Sent from my iPhone' again! This is the same for all settings in mail only, not for those in contacts or calendar. Only mail settings seem to be not working. I've tried a hard reboot, resetting network systems, restoring my phone. What should I do? This is really bugging me. All help is really appreciated!