AT&T and Yahoo! announced that beginning today Yahoo! oneSearch will powers mobile Internet searches made through AT&T’s on-deck MEdia Net portal.

Yahoo! oneSearch will provide customers who search AT&T MEdia Net with access to news, financial information, weather conditions, Flickr photos and Web images, as well as Web and mobile web sites. Yahoo! oneSearch will also display relevant ringtones, wallpaper, games and other content available in the AT&T MEdia Mall within search results, eliminating the need for customers to search within a separate window for downloadable content. AT&T’s YELLOWPAGES.COM will provide local search information to customers as part of the agreement.

Also beginning today, Yahoo! will provide mobile-sponsored search advertising within mobile search results conducted through the AT&T MEdia Net portal.

“With Yahoo! oneSearch, we created an award-winning mobile-first search experience capable of delivering relevant answers to mobile users on-the-go. With over 60 partnerships with leading mobile operators around the globe, we are a leader in mobile search and are incredibly excited to bring Yahoo! oneSearch to more and more users every day,” said Bruce Stewart, vice president and general manager, Connected Life Americas, Yahoo! Inc. “Together, AT&T and Yahoo! are meeting consumer demand for compelling mobile services, while creating scale for advertisers, enabling them to reach the rapidly growing audience of mobile consumers.”