Facebook wants to be so much more than just a social network app. It wants to be your go-to SMS with Messenger. It wants to be a Reddit replacement with Rooms. You can even overlay Android with Facebook Home. Now your dialler is in Zuck's crosshairs.
The screenshot above is courtesy of Android Police, who first reported the "oopsie" that some poor engineer is probably getting scolded for, and that's pretty much all the information we have so far on the new "Phone" app.
Phone will automatically block calls from commonly blocked numbers and serve up caller info, which makes sense. Facebook has a tonne of users who have their number tied up in their accounts in some way, so even if you've never talked to the person, Phone could theoretically tell you who's calling.
Messenger can also do voice calls, but it's on a Messenger-to-Messenger basis, where Phone seems like a service wedged between carriers and you. Like Facebook Home, the app will most likely be an Android-only affair, considering Apple's closed ecosystem only lets you choose between its stock dialler and... no wait, just the stock dialler.
Even though the public universally rejected Facebook's attempt tobe your phone, that doesn't mean Mark Zuckerberg is giving up. They're just taking a different approach—one new app at a time.