I get it but I just think a lot of people would seek out WIFI to make the call for free and with less hassle. Also things are changing, on my network we now have "feel at home" which allows us to use all our minutes, texts and data in about 30 different countries at no extra cost and the EU is getting rid of roaming charges. There may be times when Ziber would be useful but I just don't think the mass market would ever need it.