Nielsen reports on market share for smartphones in the US, with an interesting split between domination for OS and domination by actual device. Google Android is currently the top operating system, at 39 percent, with Apple's iOS at 28 percent, and the RIM Blackberry at 20 percent. "However, because Apple is the only company manufacturing smartphones with the iOS operating system, it is clearly the top smartphone manufacturer in the United States." iPhone has 28% of the market. All of this is based on June, 2011 data.