Also, TMO offers unlimited data roaming, and $.20/minute calling, pretty much world-wide. The data is capped at 2G speeds (that's the main reason it's slow), so

Also, TMO offers unlimited data roaming, and $.20/minute calling, pretty much world-wide. The data is capped at 2G speeds (that's the main reason it's slow), so it's painful for interactive web apps but more than fast enough to pull down emails or grab a public transit timetable from Google Maps, if you're patient. For anyone who travels overseas more than once or twice a year, this is a godsend.