According to Kantar WorldPanel in the three months ending April 2013 Windows Phone powered 5.6% of the smartphones sold in the US market, while Android remained in the lead. The Google platform had a share of over 51.7%, while its closest rival iOS is controlling 41.4% of the market.

Compared to the same period of last year, iOS is the biggest winner, gaining 2.3 percent points, while Windows Phone climbed 1.8 percentage points. Android's modest 1.4 percentage point growth made it only the third fastest growing platform in the US. That's still better than BlackBerry, though, which was pushed into a corner losing 4.6 percentage points of its market share and powering under 1% of the smartphones sold in the three months period.

Unsurprisingly, Kantar attributes the raise in Windows Phone interest mostly to Nokia's Lumia lineup.

In carrier news, Verizon remains the largest carrier in the country with 36.3% of the market (a rise of 1.8 percentage points), followed by AT&T with 26.3 (up 0.3 percentage points YoY).