Samsung D600 - Unlocking?
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 ;)
blackberry 8100 pearl and email / browser ?
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.
is there any free software on the net for unlocking cell phones?
Sure, just Google, "cell phone unlocking services" .