I flashed my K800i, and unlocked it.
What I did was to custom change the CDA code when I flashed the fs file, or ensure you have choosen the right region fs file.
I used: Simlockpatch gen v2.1, and XS++ v3.2 plus setool2lite v1.10
Maybe this thread may help!
http://www.topsony.com/forum/cmps_in...?page=CDA_K800