America’s smartphone operating system market share Q3-2011, July to September: Google Android remained stable at 43%, Apple iPhone was constant at 28%, RIM BlackBerry’s share was steady at 18%, and Windows Phone was stable at 7%

Data provided by research firm Nielsen showed smartphones representing 43% share of all phone subscribers in America by the end of the third quarter of 2011 (September 30).  The research firm also found over 50% of users in the age group of less than 44 year-old has used smartphones to communicate with friends, families, and colleagues and access mobile web.

While several handsets makers including Sony Ericsson will drop producing feature phones, the adoption of smartphone continues to skyrocketing in America.  Google Android remained stable during the Q3-11 and captured 43% market share of smartphone operating system.

The popular Apple iPhone remained steady and controlled 28% market share of smartphone OS. 

While suffered from several outages during the quarter, RIM BlackBerry’s share was stable at 18%. 

The newly launched operating system from the giant software company Microsoft dubbed as Windows Phone 7.5 (product code name “mango”) hold at stable level and captured 7% smartphone operating system market share for Q3-11.

(Chart: Nielsen)