I used this sevice 2 days ago.
I got the unloack code from htc-unlocker.org and it worked like a charm, paid almost $ 38 USD, as the new HD2 have some restricted codes unavailable from other sites, I did try a couple of others which were offering the code for as low as 15-20 USD but they didnt work, so ended up paying premium amount, but I can use my phone now.
If you have T-Mobile USA, just call them and tell them you are visiting family overseas, need to unlock it to not get killed with Roaming charges (want to put in a local sim when you get there)... they will e-mail one to you within 24-48 hours... best part is it's FREE!
If you have T-Mobile USA, just call them and tell them you are visiting family overseas, need to unlock it to not get killed with Roaming charges (want to put in a local sim when you get there)... they will e-mail one to you within 24-48 hours... best part is it's FREE!
If this is for T-Mobile USA:
simply search for "HTC HD2 T-Mobile unlock code" on ebay. I unlocked mine for US$8 i think. When ordering, you have an option to type in a message to the seller. Type in the Carrier name (e.g. Tmobile USA) and the IMEI number, which you can find on the phone settings software or behind the battery.
It's a very simple process and I received my code by email within a couple of hours following payment.