If you're in the U.S. or Canada, Facebook Messenger for iPhone now lets you place Skype-like VoIP (voice over IP) audio calls over Wi-Fi to any of your friends who also happen to be in the U.S. or Canada. There's no FaceTime-style video calls yet, and no international calls, and the quality doesn't yet sound as good as Skype, but if you live in Facebook Messenger, it can be a convenient alternative.
The only problem is, Facebook hasn't exactly made the calling process obvious. And in some cases, it's downright cumbersome. Here's how you do it...
That's it! Provided you're both in the U.S. or Canada, and both on Wi-Fi, Facebook will connect your call.
Note: You have to have Facebook Messenger running, or have Push Notifications enable to alert you to incoming calls, or you won't know if or when a friend calls you.
If you get it working, or figure out any way to connect a call without jumping through the text messages hoop, let me know!