Android has grown enough to break the iPhone out of its majority of mobile ad share, Millenial Media found in its latest study. Google's share of the US smartphone space saw it jump seven percent in August to reach 26 percent of ad traffic. iPhones still had a clear lead in share but were pushed back to under half at 48 percent with "flat" growth. The BlackBerry also grew slightly, but at 19 percent was now more clearly being outpaced by Android.