Yahoo! has announced the signing of a deal with communications holding firm AT&T which will see the former’s oneSearch power mobile internet searches made through the latter’s on-deck MEdia Net portal.

In addition, the search engine firm will provide mobile-sponsored search advertising within mobile search results which take place through the platform.

Michal Bowling, vice-president of converged services at AT&T, states Yahoo! oneSearch is an "important step" in the delivery of convenient and intuitive mobile searches.

Scott Ellison, vice-president of mobile and wireless communications at IDC, adds: "This partnership with AT&T will enable Yahoo! to reach tens of millions of mobile internet users in the United States and provide advertisers with reach and scale."

In other news, Google has announced the formation of a strategic advertising partnership with media and entertainment firm NBC Universal which will see the two companies collaborating to develop advertising metrics and attract non-traditional advertising partners.