History of the mobile phone in America

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The history of the mobile phone is such a remarkable chapter in the human pursuit of excellence. Since its inception, a lot of research has been done in just a span of about half a century. The man does not stop reinventing and innovating these phones to make life easier and adapted to the lifestyle and individual needs. It has become the most powerful device after computers.

In the case of the US, the mobile phone bill can be divided into three different important points. First is the feature from its inception as a car phone that led to the compact phones we know today. Second, there is the technology used to adopt radio frequency to send voice signals. Third is the pace of development, from a car phone to analog to its current digital grandeur.

Let’s take a look at the history of the mobile phone in terms of its features.
During the 1940s, cell phones were car phones used by police, ambulance services, and trucks. This continued until 1973 when Motorola designed a system that does not need to be installed in automobiles. Several years later, they became smaller and more compact.

Technology and the pace of mobile development in the history of mobile phones in the US go hand in hand with these cases. When AT&T through Bell Labs proposed to the Federal Communications Commission (FCC) that a mobile phone system would be established by placing six cell or base stations in an area with a less powerful central transmitter to ensure continuous communication between users, the commission hesitated. What they did was assign a limited frequency to be used as a solution to this proposal. Apart from the limited frequency, the technology to operate was not available at that time. It was only acted after 37 years giving 800 MHZ. to be implemented by telephone companies. The interested parties themselves caused the delay.

Meanwhile, mobile phone companies continued to improve the technology. AMPS or Advanced Mobile Phone System was invented in the 1980s. This system brought analog technology into play, equated with a radio transmitter. The downside of this technology is that it does not allow multiple users at the same time. The signal is also weak and static when the user moves from one place to another.

Analog was replaced by digital technology in the 1990s. Digital makes stronger and clearer signals possible. It can also handle multiple users.

Mobile technology is divided into three different types, CDMA, TDMA, and SMS. These make internet browsing and international calls possible. The United States of America has yet to create more innovations, but it has already made a significant and impressive contribution to the development of mobile phones.

Today, it is still reinventing itself to cope with man’s ever-changing standard of living. Little by little they are specializing to adapt to the special needs of people.

MONITORING TECHNOLOGY GROUP INC
… or “telephone”, is linked by radio frequencies to transmitting and receiving base stations that connect the user to a conventional telephone network …
www.survtech.org/home/cellphoneforensics.php

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