For the first time in history, a majority of smartphone users in the U.S. now own an Android device, according to a new report out today from comScore. The report put Google’s share of the market at 50.1 percent, up 17 percentage points from the same month last year.

Apple came in second at 30.2 percent, followed by RIM at 13.4 percent and Microsoft at 3.9 percent. ComScore found that 104 million people in the U.S. owned smartphones for the 3-month period ending in February.

As seen in the accompanying chart, Microsoft continues to lose share despite big promotions of its new Windows Phone operating system. The company will need a big boost from Lumia 900, a Nokia device set to launch April 8th.

But even that $100 device might not be enough to get Microsoft back on track in mobile.

Previously on GeekWireAT&T confirms April 8th release of HTC Titan II and Lumia 900

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