44.7% of US mobile phone users surveyed say a mobile phone with better Internet capability will be a key factor in their next mobile phone purchase decision. Only 26% of mobile phone service subscribers currently opt for an Internet access plan. US mobile search advertising revenues are expected to grow from $33.2 mln in 2007 to $1.4 bln in 2012, representing a compound annual growth rate of 112%. 9.8% of respondents used their mobile phones to conduct Internet searches for products and services in their local area. During the same period, 10.7% downloaded or looked at maps, while 10.9% indicated they had downloaded search or mapping applications (for use on the Internet) to supplement those that came with their mobile phones, Kelsey Group said.