FOOT ON THE PEDAL - WORLD MARKETS: iOS & ANDROID ADOPTION TRENDS 
By Flurry (Blog) on 27 Aug 2012. Partial report quoted from TechCrunch.

The United States still leads in the number of active iOS and Android devices with 165 million, with China coming in just behind it with 128 million net active smart devices. From there, the numbers just sort of drop off — the UK finishes in third with 31 million active devices, while South Korea and Japan round out the top five with 28 and 22 million respectively.

More after the jump.

The rate of smartphone adoption device adoption has surpassed any consumer technology in history. China became the largest smartphone market with regard to devices shipped late last year, and now Flurry pegs China as (what a surprise!) the fastest growing market for iOS and Android devices. China’s smart device market grew just over 400% year-over-year, easily pulling ahead of BRIC compatriots Russia and Brazil, whose smartphone markets grew (a completely respectable) 189% and 220% respectively between July 2011 and July 2012.

Other graphs of interest: