Android held a dominant lead in the southern and southwestern states, while iOS was the platform of choice for those in the northeast and mid-west. New England ranked particularly high for iOS users, while New York stood out as the sole territory where BlackBerry still reigns supreme.
Jumptap's findings give Android the lead in the US with a 38 percent share, but iOS showed stronger figures than others have reported with 33 percent of the market. Given that the study is based off of ads served by Jumptap's network, the results should be viewed in terms of general trends rather than an actual representation of smartphone sprawl.
source: Android Phone