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Apple and Samsung Electronics, the two technology companies that make almost all the profit in the smartphone market, have grown even stronger in the United States.

A recent study by the NPD Group, a research company, found that 42 percent of smartphone owners in the United States were using iPhones in the fourth quarter of 2013, up from 35 percent in the same period a year earlier. And 26 percent were using Samsung phones last quarter, up from 22 percent the previous year.

Conversely, fewer American smartphone owners reported having phones made by Motorola Mobility, HTC or BlackBerry, according to NPD.

The report did not track phones using the Windows Phone operating system, so Nokia, which uses that software, did not appear. In general, Nokia’s phones have not gained traction in the United States, although Nokia’s phones are selling stronger in overseas markets like Argentina, India, Poland and Russia.

The NPD numbers underscore especially disappointing results for Motorola. Last year, the company aggressively promoted the Moto X, its first flagship smartphone made under its new owner, Google. Yet despite these efforts, Motorola’s presence in the United States last year dwindled compared with 2012, according to the study. Perhaps, like Nokia, Motorola will have better luck overseas with Moto G, its low-cost phone for developing markets.