Will the "Facebook phone" make an appearance at Mobile World Congress next month in Barcelona? According to a report from City A.M., HTC will launch two Facebook phones at the conference.

According to unnamed sources, the Facebook smartphones will run on tweaked versions of Google Android and bear the social network's trademark blue color. It will be fully integrated with Facebook contacts, enabling instant voice and data calls, and display Facebook updates and messages on the home screen. City A.M. identified Facebook's Joe Hewitt and Google Chrome's Matthew Papakipos as the men behind the launch.

Facebook flatly denied the report on Thursday morning. "Facebook is not building a mobile phone," a Facebook spokesman said. "As we've long said our mobile strategy is to enable people to not only have access, but also a great Facebook experience from any mobile phone they choose.

HTC declined to comment

Rumors about a Facebook phone emerged in September. At the time, Facebook said it was not in the phone business, something CEO Mark Zuckerberg reiterated in an interview with TechCrunch.

That doesn't mean Facebook isn't interested in mobile, however. Yesterday the company announced the acquisition of a mobile ad platform, Revel8tion, presumably to better target its 200 million mobile app users.

Editor's Note: This story was updated at 12:30pm Eastern time with comments from Facebook.