Yesterday Apple revealed the much awaited iPhone OS 4.0 featuring multitasking, Folders, iAd advertising platform and GameCenter which will bring matchmaking, Leaderboards, Achievements to the Apple gaming platform for iPhone/iPad/iPodTouch. Upcoming iPhone HD will be featuring the OS 4.0 by default when it releases this June.

If you want to experience the goodness of iPhone OS 4.0 now, then you can download the 4.0 beta firmware which has recently leaked online.

Download links for iPhone 4.0 SDK and iPhone 4.0 Firmware

Download iPhone SDK 4 Beta

Apple Website for Developers

or from this location

Download firmware 4.0 for iPhone

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