Do you make many international calls when on the go? I can see this being useful if you don't currently have a cell phone. If you did, outside of cheaper inte

Do you make many international calls when on the go? I can see this being useful if you don't currently have a cell phone. If you did, outside of cheaper international calls, it seems really redundant. Plus if you ever traveled outside the signal radius you'll effectively have a big lump of plastic wasting space in your pockets (on top of everything else you carry). All that said I think this would be a fun side-project and really with the rise of municipal broadband and services like Fon, I can see this being somewhat viable in the long-term.