According to the latest data from comScore, the iPhone saw a very small gain in U.S. smartphone market share from the three months ending in October 2009 to the three months ending in January 2010. The report shows that Apple’s average U.S. smartphone platform market share rose from 24.8% in the quarter ending in Oct. to 25.1% in the three months ending in January, a gain of only 0.3%, leaving Apple in second place. Over the same period, BlackBerry-maker Research In Motion saw market share gains of 1.7%, giving it 43% of the market, while Google’s Android platform market share more than doubled, rising 4.3% to grab 7.1% of the market. Both third-place Microsoft and fifth-place Palm saw losses during the same period, of 4% and 2.1%, respectively. The report ranked smartphone operating system platforms in the U.S. according to their share of current mobile subscribers age 13 and older.