Cell Phone History - The Evolution of the Cell Phone :: Expository Essays

Cell Phone History - The Evolution of the Cell Phone Cell phones have become a part of mainstream culture. tardily they have become more affordable and accomplish much more than making and receiving calls. Along with the growing popularity there is also growing concerns about pencil eraser and wellness. In this paper we will address cell phone history and how they have evolved. We will discuss health concerns such as tumors and talking season driving. Finally, we will talk about all of the technology that cell phones can accomplish such as receiving Email and buying stocks. History In 1921 the Detroit scratch Police Department first used mobile radio in a vehicle. Digital wireless and cellular roots started in the mid-forties. In the 1940s reinvigorated frequencies between 30 and 40 MHz were available. There was an increase of availability in channels which police systems were encouraged to use. Mobile units were available inside private companies, individuals, and pub lic agencies. In St. Louis, 1945 the first mobile telephone system in the US was introduced. Along the highway between New York and Boston a Public mobile system carried greater frequency distance in 1947. In 1n 1949, the FFC authorized separate radio channels to common carriers. A new system was developed with automatic channel selection in 1964. With this new system each call allowed customers to dial for themselves and it eliminated the need to push-to-talk operation. In 1975, in Chicago, AT&T was authorized to develop a cellular system. After this AT&T and Bell labs work with other cellular vendors to develop their cellular phones. Their phones were do so consumers would have the quality products available to use on cellular networks. There are many reasons why the mobile wireless has not progressed move on in the last 60 years, this is because of cautiousness and federal regulation. The federal official Communications Commission controlled frequency availability. Th eir regulations and unresponsiveness had the most significant factors hindering radiotelephone development. The Federal Communication Commission delayed the technology in America by ten years. Health Brain tumors and eye cancer are two health concerns of cell phones that are currently under investigation. Many people have heard rumors about whether or not cell phones are responsible for these health problems, but answers never seem to be found.