Will I be able to use 'Talkatone while in Mexico to call the US?

Going to Mexico for a month. Would be nice to know if "Talkatone" app on iphone will work in Mexico, for call the United States. Anyone know. Conflicting answers on google.

Thanks

Added (1). It is free calling to the US & Canada. But would it be free calling to the US From Mexico?

I would think so. I have a friend in Canada I talk to with the app so it'll probably work in Mexico with Internet connection

I'm here now and it doesn't work. Calls get dropped after one ring. I read it has to do with Mexican IP restrictions.