The iPhone has made slight gains in US smartphone marketshare, apparently at the expense of BlackBerry and Windows Mobile devices, a new Nielsen study reveals. Between Q4 2009 and Q1 2010, the iPhone rose 2 percent in the market to hit 28 percent. BlackBerries have retained their dominance, but nevertheless slipped 2 percent quarter-over-quarter to sit at 35 percent. Windows Mobile phones have lost similar ground, and now account for 19 percent.
