Perhaps it has to do with Apple positioning itself as a mobile devices company, but the iPhone is on a serious upswing in the U.S. smartphone market, even while all of its competitors seem to be losing ground. Except for one, that is, and the rate at which that company is building up steam should give the Mac maker cause for some concern. For the moment, though, Apple is doing much better than anyone in the space, really. The latest comScore report , which covers a three month period from September to December of 2009, shows Apple as having 25.3 percent of the total smartphone market share, up 1.2 points from 24.1 percent at the beginning of the period measured. Research In Motion (RIM) came in first place overall once again, with 41.6 percent of U.S. smartphone subscribers opting for a BlackBerry device. But that number represented a slide, ultimately, as RIM began the measurement period with 42.6 percent. Microsoft and Palm likewise slipped, with MS dropping from 19 to 18 percent, and Palm losing 2.2 points, down to 6.1 percent. Google had the lowest market share of the bunch, with 5.2 percent of subscribers. But that number was up from only 2.5 percent in September, suggesting that it was probably helped along considerably with the introduction of the Motorola Droid.



