With 31 states either outlawing or considering a ban on cell phone use in a car without a hands-free device, the cell phone and automobile industry turned the negative into a positive bottom line, it was announced on June 2. The latest cars on the market are already equipped with "Bluetooth" — a wireless technology that uses short-wave radio to connect your phone to your car without cables.With a Bluetooth-enabled phone, the car automatically recognizes the phone and takes the call over when you get in, letting you go hands-free. Or if you are driving, the car responds with voice activation and acts like the phone. You can call out or answer a call as long as the cell phone itself is anywhere in the car — even the trunk. Certain models from major manufacturers — Acura, DaimlerChrysler, Lincoln, BMW, Toyota, Lexus, Jeep and Dodge — all currently have this technology as an option.