And then this link says that at the same time, Symbian is the top dog. (Dec, 2011).

And here, it’s Android in the number 1 spot (in the U.S.). (July 11, 2011).

These charts and numbers often don’t tell you what they are measuring… the World? The U.S.? The Democratic Republic of the Congo? That’s why charts can be so misleading, I guess.