yes iunlock.app does the trick, used iBrickr and wInstaller on a Mac Pro running windows home in dual boot, everything went flawless, uploaded the unlock, let the app do its thing on the phone which took about 15 minutes. Then to our amazement everything except visual voice worked.
It didnt help that me and my friend are to this day T-Mob reps and know how to get all the info we needed.