Studies show that using a hand-held mobile phone while driving is a dangerous distraction. It's illegal in New York, New Jersey, Connecticut, and California. There are 28 states with some type of restriction on hand-held cell phone use while driving. Switching to a hands-free system that eliminates phone handling, manual dialing, etc. dramatically reduces distractions. Many in-car GPS receivers offer wireless connectivity to mobile phones, including microphones and speakers, and touchscreen display to control the phone. Here's how to use your in-car GPS to go hands-free.