Apple has released another version of the iOS 5.1.1 software for GSM versions of the iPhone 4 only, reports iPhone hacker iH8sn0w. This update is build number 9B208 and no information is known about it at this point.
Was just about to push sn0wbreeze 2.9.4 and Apple pushes 5.1.1 (9B208) for the iPhone 4 (GSM) only. I wonder what changed…
— iH8sn0w (@iH8sn0w) May 26, 2012
This update was previously released on May 7th, and featured a list of improvements including improvement of HDR reliability when using the lock screen shortcut, AirPlay fixes and a security patch for a Safari exploit.
Apple has, from time to time, found issues with iOS builds and re-released them for update to devices. That may be what triggered this update.
GSM iPhone 4 users, that’s AT&T customers here in the U.S., can get the update by tapping Settings>General>Software Update or by plugging their device into iTunes. If you’re already using iOS 5.1.1, then you won’t be seeing this update as it’s a replacement of the old build, not an upgrade.
You can download the new firmware directly here.