Game Over: Latest Nielsen survey says over 90 percent of US Smartphones purchased in last 3 months are iOS or Android

With iOS gaining roughly 30 percent United States marketshare as of Q4 2011 at the expense of RIM, Nokia and Microsoft, new numbers from Nielsen’s latest study show just how much of a duopoly the U.S. market has become. While noting about 50 percent of mobile subscribers in the U.S. are now smartphone owners, Nielsen gave a breakdown of how the two leading platforms continue to dominate as of February 2012:
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