Dr. Martin Cooper invented the first portable cell phone in April 1973.

Born December 26, 1928 (age 82) Residence Chicago, Illinois, USA Nationality American Education Illinois Institute of Technology Occupation Inventor Entrepreneur Employer Motorola CEO & founder of Array Comm Known for Inventing the handheld cellular Mobile Phone Title Engineer

A mobile phone (also called mobile, cellular telephone, or cell phone) is an electronic device used for two way radio telecommunication over a cellular network of base stations known as cell sites. Mobile phones differ from cordless telephones, which only offer telephone service within limited range through a single base station attached to a fixed land line, for example within a home or an office.

Mobile telephones are two-way radios. When you talk into a mobile telephone, it picks up your voice and converts the sound to radiofrequency energy (or radio waves). The radio waves travel through the air until they reach a receiver at a nearby base station. The base station then sends your call through the telephone network until it reaches the person you are calling. When you receive a call on your mobile phone, the message travels through the telephone network until it reaches a base station close to your phone. The base station then sends out radio waves that are detected by a receiver in your telephone, where the signals are changed back into voice or data.

1843 Micheal Faraday a talented chemist begins researching the possibility that space can conduct electricity A Virginia Dentist/Scientist, Dr. Mahlon Loomis, develops a method of communicating through the earth’s atmosphere by using an electrical conductor The Police Department in Detroit, Mich. begins installing mobile radios, operating around 2 MHz, in their squad cars AT&T comes out with the first radio-car-phones that can be used only on the highway between New York and Boston; they are known as push-to-talk phones The first real car phones, not car radios, come into play accross the United States AT&T is the first company to propose a modern-day mobile-phone system to the FCC. It involves dividing cities into “cells”. It is the first company to do so Dr. Martin Cooper invents the first personal handset while working for Motorola BellSouth announces that it is leaving the pay phone business because there is too much competition from cell phones.

Good to have for emergencies People can always reach you when needed Stylish Internet connection Can be used worldwide It can fit in your pocket. Very enjoyable Disturbance No service in certain areas Hidden charges They can damage your ear Expensive People use the phone while they are driving, and this can cause problems. Pro’sCon’s

A cell phone is not only useful but also an excellent safety device. If the electricity goes out, a cell phone will still work when a cordless phone will not. The invention of the cell phone is credited to Dr. Martin Cooper, who worked for Motorola at the time. The first cell phones were very large compared to modern cell phones. The call was made to one of Cooper's rivals, who at the time worked for Bell Labs. Cell phones do more than just make phone calls. Texting allows two or more people to type out messages and send them to another phone. Games, phone wallpapers and custom ringtones are available to download. According to the Columbia Encyclopedia, Cell phones operate on the same principle as a radio. The phone sends out radio signals which are transported to the receiving cell phone. Cell phones come with a basic warranty that covers defects for a certain period of time. The phone warranty does not include damages caused by the owner, such as dropping the phone and breaking it. It also does not cover water damage. While a cell phone can still be saved if it is submerged in water, a sticker located inside the phone changes color to alert the company that the phone has received water damage and the warranty is void.

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