Preview at WWDC likely in June, followed by September launch.
Apple Testing iOS 6.0.1 with Fixes for Keyboard Screen Glitch, Camera Flash Issues, and More
iOS 6.0.1 should fix the horizontal lines bug on the screen when the keyboard or app folder is open, and it will also fix a problem with the camera’s flash not going off.Apple is reportedly also just beginning testing of iOS 6.1, with the timing of that testing suggesting that the update is not likely to arrive in time for any of the new hardware launches over the coming weeks. It is also unclear what changes are included in iOS 6.1.
In addition, the new software will improve Wi-Fi support, fix cellular data not working in some cases, add a consolidated cellular data switch for iTunes Match, fix a bug that allowed access to Passbook pass details from the lock screen, and also finally fix the bug that caused Exchange meetings to be unexpectedly cancelled for the entire calendar invite group.