When I try to toggle the on/off button in iCloud apps (like Contacts, Notes, Safari, etc) in my iPhone (by Settings - iCloud), It always show the HUD (like "Turning On Notes...") for a long time. But nothing happens.
Note: I have the iOS version 6.0.1. I deleted the iCloud account from my iPhone then again tried to login with my Apple ID. But same error occurs if I tap on/off button.