I do the same, but international phone calls are still rather impractical compared to Hangout / Skype-like tool of choice. And this is coming from a Linux user

I do the same, but international phone calls are still rather impractical compared to Hangout / Skype-like tool of choice. And this is coming from a Linux user who doesn't get supported by many such tools :) At least most tools have a way to dial into them from a standard phone.