As expected, Apple team has eventually released the iOS 4.3.1 update for iDevice users. iOS 4.3.1 is not a major updates as iOS 4.3, but it brings important improvements and bug fixes to the compatible devices.

Features of iOS 4.3.1
This update contains improvements and other bug fixes including:
- Fixes an occasional graphics glitch on iPod touch (4th generation)
- Resolves bugs related to activating and connecting to some cellular networks
- Fixes image flicker when using Apple Digital AV Adapter with some TVs
- Resolves an issue authenticating with some enterprise web services
iOS 4.3.1 firmware update can be downloaded and installed on iPod Touch 3G, iPod Touch 4G, iPhone 3GS, iPhone 4 (GSM only), iPad and iPad 2.
Download iOS 4.3.1
This firmware update can also be downloaded from iTunes software. Download Link. If you want to preserve your jailbreak and unlock on your iDevices, avoid this update.
Update 1 : Redsn0w 0.9.6 RC9 Download Links
Update 2 : Download PwnageTool 4.3
Update 3: Ultrasn0w 1.2.1 unlock for iOS 4.3.1 devices.
Update 4: Download iOS 4.3.2 and iOS 4.2.7 firmware updates
