Originally Posted by southwestcomm
Sorry it will not. Contacts are stored in the internal memory on the BB and it does not have the ability to store or read from the SIM.
You absolutely *can* read contacts from the SIM on a Blackberry... Go into your contacts, click the wheel and scroll down to "SIM PhoneBook", once in there you can copy all contacts to the Blackberry Address Book.
There is no way to push the BB Address Book onto the SIM card though.