Facebook has once again flatly denied rumors of working on a "Facebook phone," as rumored on Wednesday.

"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.

"We're working across the entire mobile industry with operators, hardware manufactures and app developers to bring Facebook to mobile phones in a variety of unique and exciting ways. Some of these include deep integrations of Facebook within the device, but are not "a Facebook phone" as they sometimes are referred to by commenters."

Yesterday, "Facebook phone" speculation was rife after a British daily reported HTC was launching two Facebook phones, in collaboration with the social networking giant. The reporter claimed he saw an Android device encased in Facebook's trademark blue, among other integrative features.

This morning Dan Rose, head of business development at Facebook, told reporters at an event in London, "This is really just another example of a manufacturer who has taken our public APIs (application programming interfaces) and integrated them into their device in an interesting way."

"The rumours around there being something more to this HTC device are overblown," Rose said, according to Reuters. When someone asked if the phone would be "Facebook-branded" Rose said, "no." Any manufacturer can integrate Facebook APIs. In fact, HTC and LG already have an integrated Facebook client on all its high-end Android phones. However, to coat a phone in Facebook colors and logo would require a closed agreement.

HTC declined to comment on the speculation.

This is the second time Facebook has had to make it loud and clear that it was not in the mobile hardware business, at least not yet. In September, Facebook CEO Mark Zuckerberg clearly denied a similar rumor sparked by a TechCrunch report.