What are folks doing to maintain contact with family back home in the US while traveling all over the world. I am aware of things like Skype, WiFi calling in the hotel, etc.

I am trying to figure out what would work best when "out and about" away from wifi coverage to keep in touch with the wife and kids. I currently have AT&T but their prices seem a little high.

What is everyone doing? Has anyone had good luck with the Tmobile plan?