Apple has set the standard that once every year they will release a new version of the iPhone. It stands to reason that this year will be no different, with a new model likely coming sometime this summer. But arguably just as important as Apple’s hardware refresh is the accompanying software refresh that comes with it as well. And that’s why it shouldn’t be surprising at all that whispers of iPhone OS 4.0 are starting to grow. But this year, the timeline appears a bit off.

As AppleInsider reported today, iPhone OS 4.0 is likely to deliver multitasking support. If true, that will make it perhaps the most important OS upgrade for the platform yet. However, in reporting the news, AppleInsider also notes that the software, “remains under development and reportedly has a quite ‘way to go’ before it’s ready for prime time.” Looking back at the iPhone OS SDK history you’ll notice a constant: Apple has released the beta builds in March the past two years. We’re already well into March this year, and so far, no word about Apple being close to doing the same.

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