What you're saying though is still not true: I can go to US and use unlimited data for no extra charge. There is a charge; it's part of your contract package.

What you're saying though is still not true: I can go to US and use unlimited data for no extra charge. There is a charge; it's part of your contract package. I'm sure it's a fantastic deal and for a traveler who uses mobile data in the US, it makes a lot of sense. But Three aren't doing this out of the goodness of their hearts. The charge for this data is part of your phone plan. Three (or another network) could provide an alternate package that didn't provide 'free' US data for a lower monthly cost.