If your BlackBerry is only displaying the phone number of an incoming call, and not the name or label assigned to it in your address book, you need to disable content protection.
Go to: Settings -> Options -> Security Options -> General Settings -> Content Protection
Either disable Content Protection or keep Content Protection Enabled, but select “No” next to “Include Address Book:”
And now you won’t offend every single person that calls you by asking who they are.
NIce… lol