comScore reports that the number of mobile game downloaders grew 17 percent from November 2007 to November 2008, when 8.5 million people, or 3.8 percent of mobile subscribers, downloaded a game to their mobile device.

“The rapid growth in smartphone adoption in the United States has provided a boost for mobile gaming, as 34 percent of those downloading a game in November did so using a smartphone,” said Mark Donovan, senior analyst, comScore. “Last year, not one smartphone appeared in the top 10 devices used for mobile downloads. This year, six out of 10 are smartphones, excluding devices with smartphone-like functionality, such as the Instinct and Voyager, which also make appearances.”

The iPhone and BlackBerry Curve have replaced the RAZR and low-end flip phones as the most popular gaming platforms, according to comScore. In fact, the number of smartphone owners downloading a game nearly tripled, while dipping 14 percent among owners of feature phones. iPhone owners accounted for 14 percent of mobile game downloaders in November, with 32.4 percent of all iPhone users reporting they downloaded a game in the month, compared with a market average of 3.8 percent.