Mobile Phones

Only available on StudyMode
  • Download(s): 289
  • Published: March 4, 2013
Read full document
Text Preview
Try to describe how and explain why,in the past thirty years,we have moved from a situation where the mobile phone did not exist,upto to today when almost everyone has one and it has become a necessity

This essay will discuss the Mobile phone and look at its origins and analyse how it has evolved over time to become a necessity in the present day. A Mobile Phone or cellular phone is a device that is used to make and receive telephone calls over a radio link over a wide geographical area.It does this by connecting to a cellular network provided by a mobile Phone operator like MTN,CellZ and Airtel in Zambia.A mobile phone can also connect to a public telephone network i.e Land line.In Zambia,Zamtel provides Land line telephone services. In the early days,communication of speech by radio link was mainly used by the Military using hand and held radio transceivers.These were also used for transmiting radio waves from land to the ship on the seas.Early communication devices of this nature were bulky and required colossal amount of energy.They also supported only a few simultaneous conversations.Modern day Mobile phone networks are able to accommodate multiple conversations and can also be used for data communication. For many of us, it's hard to imagine a time before cell phones. Until very recently, most of the people who carried mobile communication devices were people who needed them specifically to perform their jobs people like freight truck drivers and police. Before cell phones, many people used radio telephones for mobile communications. These were installed in cars, so that people could communicate from construction sites or get much-needed help during emergency situations. Decades ago, a single tower with perhaps two dozen frequencies could control the radio telephone communications for a whole city. Citizens' band (CB) radios were often used by long-haul truckers and became popular with the general public in the late 1970s. Essentially, a CB radio is a low-power, short-distance transmitter and receiver that is limited to a narrow range of radio frequencies. While most governments regulate which radio frequencies can be used for which purposes, average citizens are allowed to broadcast on the "citizens' band," sending their messages out to all CB users within range of the transmission who are listening to the channel. Ham radio, or amateur radio, is a way of communicating with people around the globe with radio waves. A ham radio can be used for entertainment or public service, though many users are simply hobbyists and technology enthusiasts. With a well-built ham radio and a skilled relay system, operators can talk to friends locally or around the world. They can even communicate with astronauts in space. Unlike CB operators, ham radio operators do not broadcast to the general public, and there is a set of rules that governs their behavior. Ham radio operators must be licensed, and they communicate to other individuals or in small round-table groups. While it has long been possible to use a ham radio as a mobile communication device, it is sometimes more difficult than using a radiotelephone or a CB radio, since many ham radio antennas are very large and must be mounted onto a vehicle or other stable structure to make transmission possible

John.F.Mitchel,Motorola’s chief of portable communication played a very important role in the advancement and development of handheld mobile phones. For the past thirty years,Mobile phones have evolved a great deal both in shape,design and use.Previously,mobile phones were huge and heavy and didn’t have fancy designs. Mobile phones have a lot of similar features but manufacturers always try to make their Mobile Phones unique by adding extra functions and features to make them attractive to customers.This has lead to brilliant innovations in Mobile Phone advancement over the last 30 years. The common features that Mobile phones have are:

A battery which provides energy for...
tracking img