According to AdMob’s March 2010 Mobile Metrics Report (PDF Link), the iPhone 3GS and second-generation iPod touch combine to generate more than 60% of worldwide iPhone OS traffic on the AdMob network. The iPhone 3GS is the most popular iPhone OS device worldwide, representing 39% of iPhone OS traffic, followed by the second-generation iPod touch with 25%, the iPhone 3G with 20%, and the third-generation iPod touch with 12%. Notably, the first-generation iPhone and iPod touch represent only 4% of worldwide iPhone OS traffic share combined, or 2% each. In terms of iPhone OS version distribution, the two most recent versions of the software dominate, with iPhone OS 3.1.3 accounting for 44% of worldwide iPhone traffic, and iPhone OS 3.1.2 following closely behind with 42%. AdMob’s metrics are based on its advertising network of more than 18,000 mobile websites and applications around the world; in March 2010, AdMob received 6.1 billion requests from iPhone OS devices.
Charles Starrett was a senior editor at iLounge. He's been covering the iPod, iPhone, and iPad since their inception. He has written numerous articles and reviews, and his work has been featured in multiple publications.