Need Help Unlocking My HTC Pure AT&T "Diamond 2"

[Guest srbbnd]

Hello,

I just moved to Ukraine from the states and was hoping to be able to use my quad band HTC Pure. It still works here with service from AT&T, but I got a different cell phone provider and would like to use this phone. However, AT&T locked it. I found this out when I put in my Ukraine SIM card. Does anyone know of any software I can use to unlock it so I don't have to pay astronomical roaming charges and so I can also use Ukrainian cell phone providers. Ukrainian phones are lacking in quality I have found and are insanely expensive. Thanks for any information.