In short, 3G (or third generation) refers to the still-developing wireless networks that will bring broadband data speeds and services to your cell phone. With speeds between 144Kbps to 2.4Mbps, you'll be able to stream music and video, download large files, zip through Web pages, and videoconference with other callers. The best way to think of it is to imagine the difference between a dial-up and a broadband Internet connection. Be sure to check out CNET's quick guide to 3G cell phone service for more information.