Nielson has released their second quarter numbers for 2012 and while 54.9% of U.S. mobile subscribers opted for smartphones, 1.3% opted for Windows Phones. This is a jump from Q1 2012 for smartphones (50.4%)and a slight decline for Windows Phones (1.7%).
Android still has the lion share of the market with 51.8% and Apple is a distant second with 34.3%. RIM is holding steady at 9% with Windows Mobile pulling in 3% of the market.
Nielson's 1.7% is somewhat less of a market share than we saw last month from Comscore who has Microsoft holding on to 4% of the market. Then again, Comscore's numbers combine both Windows Phone and Windows Mobile shares in the market.
Regardless, both reports show that Microsoft still has some work ahead of them. The slight decline in the Nielson report could be from consumers holding off on the platform until Windows Phone 8 is released later this year. It will be interesting to see how these numbers change once the new devices hit the store shelves.