If your vehicle is not prewired for a phone, you have to install a new wiring harness. This harness consists of one cable going to the headliner (where the overhead mic is located) to the center console (where the phone snap-in adapter is located,) along the driver's seat under the carpet to the rear of the vehicle where you will be installing the bluetooth module and antenna. Not something for the light hearted! I would recommend getting it done by a reputable stereo shop or dealer if they're willing to do it. Total cost for parts, wiring harness and antenna is in the $600 - $650 range plus labor.