Rael mentioned unlocking mobile phones yesterday. I followed the link trail to UnlockMe.co.uk. I downloaded the code calculator and fired it up. I typed my IMEI number in and then hit google for the correct MCC+MNC number. Eventually I ended up here which said that T-Mobile USA uses MCC+MNC number 31020. After plugging that in to the program, I hit Calculate and tried the first code. It worked like a charm. ‘Restriction removed.’
Be careful about trying to unlock your phone, it looks like you only get 5 tries and then you have to unlock it with a cable.
Legal disclaimer: I did not perform any of the actions described above. The above account is complete fiction. Yes, the DMCA scares the crap out of me.