Although Google's Android mobile operating system now powers 33 percent of all U.S. smartphones, ahead of Apple's iOS at 25 percent (according to the latest comScore data), iOS remains the driving force behind mobile advertising revenues, mobile ad network Millennial Media reports.
IOS-based applications accounted for 47 percent of Millennial revenues in March 2011, with Android at 36 percent and Research In Motion's BlackBerry far behind at 7 percent. Windows Phone, Symbian and webOS are fighting for the remaining 10 percent of revenues, Millennial adds.
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