AdMob highlighted widespread mobile Internet usage on WiFi in the United States and strong growth in Western Europe in its January 2009 Mobile Metrics Report.

Consumer usage of WiFi to access the mobile Internet is widespread across the US. The West and Northeast experienced heavier WiFi usage by population than the South and Midwest in January 2009. The states that generated the most WiFi traffic are California with 18 percent, New York with 14 percent, and Texas with 8 percent.

Other highlights from the January 2009 report:

* Worldwide requests increased 8 percent month over month to 6.8 billion, led by double digit growth in Western Europe and Asia.

* Traffic from Western Europe increased 132 percent in the last year to total 550 million requests in January 2009, with Spain and Italy growing the fastest.

* The iPhone is now the number one device by usage in Western Europe with 21 percent share of total requests. This strong share reflects dramatically higher mobile Web and application usage by consumers and AdMob's strength on this device.

* Nokia and Sony Ericsson are the number two and three manufacturers in Western Europe, with 22 percent and 17 percent share, respectively. Nokia continues to dominate the smartphone category with 11 of the top 15 devices.

* Windows Mobile has 5 percent share of market in Western Europe with only one device, the Samsung i900, in the top 15. Worldwide the Windows Mobile OS has 8 percent share of smartphone requests.