According to June data from the Nielsen ( research group, Google’s Android operating system (OS) now claims the largest share of the U.S. consumer smartphone market with 39%. Apple’s iOS is in second place with 28%, while RIM Blackberry is down to 20%.

However, because Apple is the only company manufacturing smartphones with the iOS operating system, it is clearly the top smartphone manufacturer in the US, says Nielsen. Other leading manufacturers include HTC, whose Android phones represents 14% of the smartphone market and whose Windows Mobile/WP7 devices account for 6% of the market; and Motorola, whose Android devices are owned by 11% of smartphone consumers.

Samsung’s Android devices are used by 8% of smartphone owners. Windows Mobile/WP7 phones are used by 2% of smartphone owners.