Hiptops/Sidekicks CANNOT be unlocked, and no carrier will do it for you. At least that's what I've been told from people who live overseas. Here in the U.S., they're locked to the carrier, so I'm guessing that yours is, too. Sorry, I don't think you can use the Hiptop at all unless you're on the...
I've been trying to decide between the Blackberry Curve and the T-Mobile Wing. I'm getting rid of my Sidekick 3 (too many problems for too expensive of a phone), and want to find the best alternative. I want something that can do at least most of what my Sidekick did, just as well if not better...