The telephone was invented by Alexander Graham Bell in 1876, and wireless communication can trace its roots to the invention of the radio in 1894 by a young Italian named Guglielmo Marconi. In the dark ages before cell phones, people who really needed mobile communications ability installed radio telephones in their cars. In the radio telephone system, there was one central antenna tower per city, and perhaps 25 channels available on that tower. The genius of the cellular system is the division of a city into small cells. This allows extensive frequency reuse across a city, so that millions of people can use cell phones simultaneously.
Studies show that cell phones send off radiation, which cause cancer.
Because cell phones are held so close to the users head, it can be harmful if you are exposed to it for long periods of time. There has been an increase of traffic accidents due to cell phones. But for many, the convenience outweighs the dangers. The only major study done on the dangers of cell phone use and driving suggests using one increases the risk of accidents by 400 percent. That is the same increase created by drinking and driving.