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Apple released a minor security and maintenance update for its iOS devices a few days earlier than expected to fix mobile connections, graphics and Apple TV bugs.

Apple’s iOS 4.3.1 update, issued March 25, included a handful of security and maintenance fixes for the iPhone, iPod Touch and iPad. The update comes as Apple prepares to roll out the iPad 2 to 25 additional countries.

Within hours, a jailbreak was available, according to Ultras Now, a jailbreak site.

The latest update covers the iPhone 4, third and fourth-generation iPod Touch, iPhone 3GS, iPad 2 and the regular iPad, according to Apple. The update is available for AT&T’s GSM-based iPhone, but not for Verizon’s CDMA (Code Division Multiple Access) phones.

Verizon customers are still on iOS 4.2.6, which was released in January.

Apple has resolved bugs related to activating and connecting to some cellular networks and addressed authentication issues with some enterprise Web services, according to its release notes. The maintenance release fixes image flicker that may be present when using the Apple Digital AV Adapter with some TVs. The update also fixes various occasional graphics glitches on the fourth-generation iPod Touch.

In the release notes, there is no mention of battery issues that some iOS 4.3 users complained about, nor does it mention whether the security hole Charlie Miller exploited to win the recent Pwn2Own hacking contest at CanSecWest has been closed. The issues may still be open or may be covered under “general bug fixes.”

For more, read the eWEEK article: Apple iOS 4.3.1 Fixes Graphics Glitches, Mobile Connections.