The handset industry is developing at an incredibly fast past. New features and operating systems are being introduced at a dizzying clip. In this environment, some handsets are clearly going to be left behind. As the holiday shopping season approaches, it's worth taking a step back in time to evaluate the retired phones of yesteryear (or yesterday, in some cases). Each of the devices detailed herein highlight a specific industry trend or event; they are essentially guideposts in the advancement of the wireless industry and its players. This list is not exhaustive, but it will provide a smattering of wireless history, and maybe a preview of things to come. Slideshow