06-08-2013 10:41 AM
Welcome to the BlackBerry® Support Community Forums.
Transferring Contacts from a BlackBerry Q10 smartphone to a BlackBerry 9900 smartphone is currently not a supported feature.
One option would be to pair the two BlackBerry smartphones and share each contact via Bluetooth. To do this, hold your finger on a Contact> On the side panel select Share> Select Bluetooth.
Let me know if you have any questions.