Facebook has been working on an official phone codenamed Buffy--after the television vampire slayer--according to reports from AllThingsD.

It's rumored to have teamed up with HTC to produce a fully integrated Facebook mobile device.

Facebook chief technology officer Bret Taylor is said to be leading the project. The Buffy phone will run on a heavily modified version of Android, featuring support for apps developed in HTML5, and could see the light of day in a year to 18 months, according to AllThingsD. This means the users should be able to play all his or her favorite Facebook games on the phone.

Our mobile strategy is simple: We think every mobile device is better if it is deeply social. We're working across the entire mobile industry; with operators, hardware manufacturers, OS providers, and application developers to bring powerful social experiences to more people around the world, a spokesman for Facebook told AllThingsD.

Facebook's app is one of the most popular apps on iOS, Android, Windows 7 and BlackBerry. About 350 million people use Facebook apps on mobile phones.

As of now, Google is able to fully integrate Google+ into Android phones, while Apple has a partnership with Twitter, putting pressure on Facebook to make its own device to stay competitive.