Well, unlocking a phone is much more than a simple code. You usually have to buy an unlocking program, or just get one off limewire like i did ;)
Unfortunately, it's not possible to configure it without adding the plan. Trust me, I tried that already. Your handheld has to be registered with the BlackBerry network in order to use WAP and regular browsing services.
Sure, just Google, "cell phone unlocking services" .