You will need to visit a dealer and give them the VIN number of your vehicle. They should be able to tell you if it has 'phone prep'. Just because it has the 'voice' button on the wheel does not mean that any of these options are available (Voice Command, Phone etc).

As you don't have the phone option under Nav meens that none of the phone modules are fitted - but it is possible to retro-fit Bluetooth. What you will need to buy depends on the options fitted to your vehicle.