In the days of the first cell phones, carriers used an analog transmission technology called Advanced Mobile Phone Service, or AMPS. While they could get a signal almost anywhere, analog mobiles didn't have the best audio quality. Carriers now use more efficient digital networks (CDMA and GSM), but coverage can be especially scarce in rural areas. That's not an ideal scenario when you're stuck on a deserted road with no signal. However, CDMA carriers such as Sprint and Verizon are still selling handsets that can use AMPS. Analog calls are expensive, and they zap battery life, but they can be a lifesaver when you're stranded in the boonies. They won't be around forever, though, so check out these analog phones while you can. For Sprint PCS, the LG MM-535 and and the Sanyo VI-2300 have analog roaming, while the Motorola V265 and the Kyocera KX444 are analog phones for Verizon.