Each phone gets a unique phonebook so that two users (husband and wife for example) can share the system and have access to their own contacts.
Once again, if you read the owners manual you will find that there are two functions for uploading contacts. One that allows you to send them from the phone (good if you only want to transfer one at a time, and your phone supports it), or one that reads the entire phonebook from the phone automatically. To perform the later, initiate a phonebook transfer from the F-Series, press OK in the first pop-up and OK in the second pop-up. It will then inform you that it's transferring your contacts, and after a few minutes the process is completed.