Updating PRL?

[KcLive]

When I manually try to do this : To add the PRL manually, dial ##775 on your phone dialer, press send, then click on update PRL. you'll need the PRL on your phone or a memory card (hint: activesync makes this easy). Simply use the browse feature to navigate to wherever the PRL is stored, and update it from there. : this is what I get : "Please Enter Unlock Code: "



What the heck is that?