We have T-Mobile. I did a live chat with a representative and they have a plan for foreign travel. It cost $15 monthly to add it to your existing plan. However, he said he was waiving the $15 fee and we have the plan now indefinitely for 250 countries. I suppose it was because we have had T-Mobile for many years, but not sure. When I asked what we have to do to get it to work in SXM he said we simply shut down our phone and restart and it will automatically connect to the service in St. Martin. It's unlimited text and stream and .25 per minute for calls. We'll try it out in a few weeks when we're down there. Anyone else have this T-Mobile service and how did it work? We'll be on the French side.