I went through hell to get it, but I got the unlock code for a Cingular-locked Sony Ericssson T68. You have to have finished your contract, and tell customer service that you want to take your phone to another carrier in a region Cingular doesn't service.

They'll give you the run-around, but keep pushing them, and after a few days (doing who the hell knows what) you'll get the unlock code for you phone.

Then, it's up to you to figure out how to use that code to unlock the phone.