How can I make free calls to people on Facebook messenger when you share the same mobile service?

[AC Question]

how to make free call to people on Facebook messenger when you and them have the service?

Is it just limited to a certain areas or people or you can reach anybody that uses the messenger?

 

[SpookDroid]

Re: how to make free call to people on Facebook messenger when you and them have the service?

Some areas restrict these calls (for instance, if I'm in China, I cannot receive Facebook calls but when I'm back in the States, I can). It used to be limited to some accounts, but I think now it's a feature that's rolled out to everyone. They do need to have the Messenger app installed in their phones, though. It is limited to Facebook users only. Just remember, these calls are 'free' but they use your data, so watch out if you have a data cap.