Apple on Friday released an update to its mobile operating system, iOS.

[ad#Google Adsense 300×250 in story]According to Apple, iOS 4.3.1 fixes an occasional graphics glitch on the fourth generation iPod touch; bugs related to activating and connecting to cellular networks have been fixed; image flicker when using Apple Digital AV Adapter has been fixed; and it resolves an issue authenticating with some enterprise Web servers.

The update is available for the iPhone 4 (GSM), iPhone 3GS, iPad 2, iPad, iPod touch (third and fourth generation).

The update is available via the software update mechanism in iTunes.