As you might well expect, T-Mobile have their own exclusive phones, just like everybody else. With T-Mobile, you're looking at the MDA range; things like the MDA Vario III, built on Windows Mobile. At the other end of the smartphone spectrum, you've got the Sidekick Slide, well known to anyone who's seen an American teen program in the last 3 years, as they've ALL got one over there! Finally, of course, there's mobile broadband, using T-Mobile's amazing USB Modem.