That's strange because last year I went on a cruise to Mexico and had to leave my 7730 (T-Mobile USA) behind (8 days. I had MAJOR BB withdrawal). I could not get a signal anywhere else other than my house (among many other problems with it). 2 weeks and an upgrade later, I took my 7100t to camp last year in Texas and had perfect signal the entire week. I'm hoping to be able to test the international coverage on both of my 7100 series phones next time I take a cruise and see what happens.