At the company's first-ever earnings call, Zuckerberg said that “it would not really make much sense” to build a Facebook phone. He further pointed out that Facebook is most used app on all platforms, therefore every phone out there is a Facebook phone.
Zuckerberg's comments are likely to put an end to all sorts of speculations related to Facbeook developing self-branded phone.
Recently, Bloomberg reported that Facebook and HTC were working closely on the Facebook phone, slated to launch mid-2013. The report further said the phone was supposed to launch this year but then the release was pushed back to give HTC more time to work on other phones.