I don't think that is 100% true. Cariers now share blacklist. I had tmobile phone I bought off craigs list that was blacklisted shortly after I bought it. Even after I unlocked it, it would still not work on tmobile or ATT. I was able to modify the IMEI on the phone, only then was I able to use it, kinda.
yes you can unlock it root it http://tekhd.com/downloads/CF-Auto-R...xx-smn9005.zip
and use http://forum.xda-developers.com/show....php?t=2470551
chain fire unlock make sure you follow those step if you dont know how to root let me know