In the US numbers are much closer thank global for total market share. The most recent numbers show Android at 53.3% of the US subscribershare with Apple in 2nd at 42.9%. Which is obviously pretty close to 5 Androids for every 4 iPhones. Windows is in 3rd place with 2.9%, so there are approximately 18 Android devices for every Windows device. RIM (Blackberry) is the trailer at .9%, so so 1 of those for every 60 Androids. Out of 20 random phones in the US, you should expect to see about 11 Androids, 8-9 iPhones, 0-1 Windows Phone and 0 Blackberrys. Results will vary depending on where you pick the phones (schools, tech businesses, construction sites, garbage cans, etc).