Apple earlier announced that they would be releasing iOS 4.3(update for existing iPhone/iPad/iPod Touch) on March 11th 2011. But they done it again earlier than expected. Apple has just released the very final version of iOS 4.3 for iPhone 4 (GSM only), iPhone 3GS, iPad 2, iPad, iPod touch 4G/3G.
To update to iOS 4.3, all you need to do is to connect your iPhone, iPad or iPod touch with your computer via USB and start iTunes 10.2. You will be notified about the update, and click on “Download and Install” button to get on to the new firmware.
Good news for iOS Developers
Apple XCODE 3.2.6 ( IDE for iPhone app development) & iOS SDK 4.3 for developers are available through http://developer.apple.com
You could get a beta version of XCODE 4.0 (BETA) if you are part of iOS Developer Programs($99 annual fee).
Have fun !!! Thanks APPLE for an early release.