iOS 4 Installation

How Many iPhones Are Running iOS 4?

Though iOS 4 has had its share of launch problems, it's been installed on quite a few iPhones in the month it has been available. Not to mention the amount of new iPhone 4s that were released with the software already installed, that means there are quite a few iPhone owners enjoying the multitasking, folder-loving goodness. Can you guess just how many iPhones are running iOS 4 today?

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