The rumored Facebook phone is still just that: a rumor. Nevertheless, a new rumor is already suggesting that Microsoft is looking to convince Facebook to go with Windows Phone rather than Google's Android operating system for the device.
Redmond is still biding its time as Menlo Park apparently hasn't written anything in stone. Microsoft is, however, looking to pitch the switch for the following reasons, according to a single source briefed on Microsoft's mobile strategy cited by Business Insider:
Some of the appeal is being able to drive mobile traffic to Microsoft's online properties, particularly Bing.
Microsoft's grandest desire is deep penetration in mobile that will allow it to someday offer consumers an NFC-powered payments product.
Microsoft wants to do something like PayPal, but in the physical world. It wants to get there before Google figures out how to fix Google Wallet.
Microsoft is not particularly interested in the concept of location-based advertising.
Although Windows Phone includes native Facebook support (that is arguably better than what is available on all the other smartphone platforms), there is also a separate app (update coming soon) that extends the functionality by adding support for Pages, Groups, and other features. Unlike Facebook for Android and Facebook for iOS, Facebook for Windows Phone is not developed by Facebook: it's built by Microsoft.