You can't synchronize the contacts directly, but you can use tools like BlackBerry Desktop Manager or Nokia PC Suite to transfer the contacts to your computer and then to the device. For example, using the Nokia software, you need to connect the device to the PC using the USB cable and to export the contacts to CSV file format or vCard. After that, launch the BlackBerry program, connect the BlackBerry device, select the saved contacts file and transfer it to the new device.