Research firm NPD today announced the results of its latest Connected Home Report, showing that Apple increased its share of the U.S. smartphone installed user base by seven percentage points, from 35 percent in the fourth quarter of 2012 to 42 percent in the same quarter of 2013. Second-place Samsung increased its share of the market by a smaller margin from 22 percent to 26 percent, while other major manufacturers saw their shares drop.

There are only two players in the smartphone business.