@danbwoi:
Try to upgrade the EROM CID with XS++ v3.1(just connect the phone to XS++)...

@negenborn:
how can i tell what my cid number is?
Check out this thread: General Information about Patch-Unlocking (start here if you want to unlock)

and what is the difference between a brown phone and a red phone?
Read here: SonyEricsson Hardware and Firmware Definitions!