Download iOS 6.0.1 for iDevices
Apple just released iOS 6.0.1 which contains improvements and bug fixes. iOS 6.0.1 fixes a bug that prevents iPhone 5 from installing software updates wirelessly over the air, fixes a bug where horizontal lines may be displayed across the keyboard, fixes an issue that could cause camera flash to not go off, improves reliability of iPhone 5 and iPod touch (5th generation) when connected to encrypted WPA2 Wi-Fi networks, resolves an issue that prevents iPhone from using the cellular network in some instances, consolidated the Use Cellular Data switch for iTunes Match, fixes a Passcode Lock bug which sometimes allowed access to Passbook pass details from lock screen, fixes a bug affecting Exchange meetings and so on.
Download and Install iOS 6.0.1 – Over the Air
Get the iOS 6.0.1 over the air.
From your iDevice, go to Settings > General > Software Updates.
Install iOS 6.0.1 from there.
Download iOS 6.0.1 and Install – from iTunes
Connect your iDevice with PC or MAC and wait for iTunes to bring up the update notification. From there you can download iOS 6.0.1 and update your iDevice firmware.
Beta version of iOS 6.1 for developers titled Build 10B5095f is also released.