Over 40 percent of mobile web traffic comes from Apple iPhone users, says AdMob.

The mobile advertising firm's April 2009 AdMob Mobile Metrics Report also includes figures from Gartner that estimate iPhones made up eight percent of all smartphone sales in 2008.

Gartner's figures also show that Symbian handsets were the most popular, accounting for 52 percent of all smartphones sold. However, AdMob says Symbian users only account for 26 percent of mobile web traffic.

More: http://www.pcworld.com/article/165760/