You could try experimenting on these lines which I used to transfer from a Nokia 6230i to a Nokia 3120 when I could not find a published answer or instructions. on Nokia web site or in manuals.
To transfer Names / Contacts from Nokia 6230i to another Nokia phone by Bluetooth, go to Settings, Connectivity, Bluetooth, Paired Devices and pair the 2 phones to recognise each other and use Business Card option.
In the 6230i go to "Names" scroll to selected name press "Details", press "Options", scroll to "Send Business Card", press "Select", scroll to "Via Bluetooth", press "Select", scroll to "All Details", press "Select". Display shows "Searching for Devices", when devices is found press "Select" and display shows "Connecting to New Device"
Display on new phone reads "Receive Data from (NAME OF OLD 6230i).
Press "Accept". Old device/phone shows "Business Card Sent". New device shows "Business Card Received". On new phone press "Show" and "Save". Repeat fo each entry in phone book.