The 3 UK sims do the same thing. I am using one as a test here at home. It works great for data on most services, but Pandora Music will not work, claiming it is "For US use only". I keep forgetting whenever I leave the house and expect my phone to begin playing through my car audio system. I'm pretty sure Pandora worked in other countries while I was using my T-Mobile 256kbps free streaming service though.