AdMob today released their March 2010 Metrics Report for mobile devices. The mobile advertising company outlined the growing demand for Android-based devices and found that Android’s traffic has now passed Apple’s iPhone OS in the United States.

In its report, the company found that the significant increase in Android’s growth was attributed to its larger variety of devices on different carriers. Back in September 2009, only two devices represented 96% of Android’s traffic: the HTC Dream and HTC Magic. As of March 2010 though, eleven different devices make up that 96% share, with the Motorola taking almost half (44%) with their Motorola Droid and CLIQ. HTC came in a close second with 43% and Samsung following with 9%.

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