ComScore: Android, iOS stretch U.S. lead as BlackBerry falls again

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Google's (NASDAQ:GOOG) Android and Apple's (NASDAQ:AAPL) iOS continue to distance themselves in the battle for U.S. smartphone market share, research firm comScore reports. Android closed out May 2011 controlling 38.1 percent of the U.S. smartphone market, up from a 33.0 percent market share in February of this year--a 5.1 percentage point leap. At the same time, iOS grew from 25.2 percent in February to 26.6 percent in May, edging up 1.4 percent.

comscore cumulative smartphone share

Click here to see the changes in smartphone OS market shares during the past two years.

All rival smartphone operating systems fell during the period. Research In Motion's (NASDAQ:RIMM) BlackBerry suffered the biggest drop, sliding from 28.9 percent U.S. market share in February to 24.7 percent in May--a 4.2 percentage point decline. Microsoft's (NASDAQ:MSFT) Windows Phone platform fell from 7.7 percent in February to 5.8 percent in May (a 1.9 percentage point drop), and Palm's webOS slipped from 2.8 percent to 2.4 percent. ComScore adds that 76.8 million U.S. subscribers own smartphones as of May, up 11 percent over the preceding three-month period.

Mobile data usage continues to increase, with 69.5 percent of all U.S. mobile subscribers sending text messages during the three-month period ending in May, up from 68.8 percent at the end of February. In addition, 38.6 percent of subscribers used downloaded apps (up from 36.6 percent), 26.9 percent played mobile games (up from 24.6 percent) and 28.6 percent accessed social networking sites or blogs (up from 26.8 percent).

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