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Apple has released iOS 4.3 for iPhone 4, iPhone 3GS, iPod touch 4G/3G and iPad 2 & 1G for download. The final version of Apple mobile operating system iOS 4.3 Gold Master(GM)edition was announced on 2nd March. The iOS 4.3 Third Beta was released on first February while Second and First Beta was released on 19th and 12th January respectively.