Apple has released a revised version of the recently released iOS 5.1.1. This new build is labeled 9B208 and is only available for the GSM iPhone 4. It is not sure why Apple released a new version for the iPhone 4 only, but most likely it fixes a small bug that only occurs on the iPhone 4. The new build is only available for new iOS 5.1.1 iPhone 4 (GSM) installs and will not be available as an update for users currently on the original build.