Researchers at Canalys suggested a historic milestone in smartphones today as it claimed Android had overtaken Symbian for the best-selling platform. Google's OS represented 32.9 percent of smartphones shipped in the fall and passed Nokia, whose slipping share brought it down from 44.4 percent to 30.6 percent. The Finnish company still led as the largest hardware maker, at 28 percent, but it could no longer assume it had the most popular software.