CELLULAR PHONES By: RAY P CELLULAR PHONES Each day something like 30,000 people in the United States sign up for and start using a cellular phone. With a cell phone you can talk to anyone on the planet from just about anywhere (80% of the U.S. has coverage). A cell phone is really an extremely sophisticated radio. A cell phone is a duplex device which uses one frequency for talking and a second, separate frequency, for …showed first 75 words of 570 total…

…showed last 75 words of 570 total…is a unique tag for your phone, and it is how the phone company knows who to bill for the call. When your phone transmits its MIN/ESN pair, it is possible for someone to listen, with a scanner, and capture the pair. With the right equipment it is fairly easy to modify another phone so that it contains your MIN/ESN pair, and now someone else can make calls on your account. ------------------------------------------------------------------------ **Bibliography**