i've just recently bought a new phone, a blackberry 8100, and i've just transferred my sim card, from a sony ericsson, into the blackberry, the problem is, when i open up address book, there are no contacts from my sim card there, it is empty, but i do know that the blackberry acknowledges the sim card's contacts because when i dial a number that was on my old contact list, it will show up as the name.. how do i open up the contacts so that the address book on my blackberry will have all my old contacts in it again?

See if this helps. Its a bit outdated, but should provide the answer to your question.

I just got my BlackBerry--How do I add my SIM contacts to the AddressBook? - BlackBerryFAQ

Wirelessly posted (L'neuf trois)

Yeah sounds like the numbers are only your SIM address book, but not your device one.