Here's how to set it up.
Remember when Facebook Messenger broke out of Facebook proper? A lot of users, including yours truly, were seriously irked. Why did we have to switch to entire different app just to chat with a Facebook friend?
Turns out Facebook had bigger plans for Messenger, including voice calls, chat bots, chess games and -- who knew? -- mobile payments.
It's true: You can use the Facebook Messenger app to send and receive money, PayPal-style.

