Please don't double post.
You posted the exact same question here -
http://www.blackberryforums.com/gene...cs-system.html
What, exactly, is a PCS system mean. Is it GSM? The 8320 should work on all GSM/GPRS/EDGE based systems.
What does the 8320 show on the top line of the screen? gprs? GPRS? edge?