Mobile phones are small, portable communication device that enables people to make phone calls when where they are.Â Receives and provides signals through service providers and transmission towers via satellite.Â Convenience of a mobile phone lets you communicate between themselves without the boundaries of the regions and time.
Mobile phone is a device that provides two-way communication.Â Signal transmission is a very simple idea for a mobile phone.Â It uses the theory of radio waves, which are similar to regular radio.Â Frequencies of mobile phones, of course, are stronger and better than ordinary radios to allow more transparent conversation between users.Â Transmission of these mobile phones allow the signals to send and receive from the device to the transmission facilities towers, and then to another user .Â Mobile phone signed are divided into small cells (This is because mobile phones are also known as Cell Phones earlier geographically.Â These cells allow the transmission of radio signals in order to be entitled to receive and send among mobile phones.
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The impact of technology on the mobile phone started to began in the mid-twentieth century.Â The first was the mobile telephony services in Sweden.Â It was a form of radio-tested by Swedish police for use in police cruisers.Â This form of radio telephone is a two-way radio, which are still widely used in taxis and police cruisers.Â In 1946, America's AT & T and South-western Bell took out the first commercial cellular telephony in 1946.Â This service is used communication devices that are permanently installed in vehicles.Â It uses a signal weaker (compared to mobile phones are replaced every now), but a similar theory of receiving and giving signals.Â However, the bandwidth is very low.
Modern mobile phones are being developed, research and experiments in 1970.Â AT&Ts, Motorola and Bell Labs in the USA are the pioneers in that time.Â Mobile phone was distributed by Motorola individually in 1975.Â Where the first commercial mobile phone system (also known as a network system or a system operator) was created in Japan in 1979.Â The second mobile phone system was in 1981 after the United States.Â In the late 1980s, along with all these distributions of mobile phone, mobile phone industry started to develop quickly and spreading.
These days Mobile phones are becoming more sophisticated.Â The development of mobile phones is just like the computers.Â Technology is evolving every day.Â Different functions and applications in mobile phones are created and updated.Â The network system with mobile phones, is still developing.Â Although the new 3G system had just started not long ago, many companies have already started research and development in the fourth generation (4G) system.Â The researchers hope that the 4G system can reach a speed much faster, and the connection speeds of up to 100Mbps when connected, increase network security, and improving the quality of communication regardless of voice or video.Â Via mobile phones, a lot of things, such as security system, surveillance on certain items can be easily done.Â 4G system will have to be launched in 2010.
(Palen L, Salzman M. and Youngs E. 2001)
Mobile phone, a piece of it becomes a communication tool as well as many devices operate.Smartphones and PDAs are already running in the market.Â With new models of mobile phones on the market recently released, shows that mobile phone manufacturers are currently in the market.Â Mobile computers with features that will be able to replace other devices such as laptops, PDAs, and even the tools of entertainment devices.
Where we have all advantages of mobile phones there are some disadvantages faced by our world in daily life for example: mobile phone addiction is a big social problem.Â Psychiatrists believe That mobile phone addiction is Becoming One of the biggest non-drug addictions in the 21st century.Â Along with the age drop of the mobile phone users and the ease of prepaid PROVIDE method to the system operators, most teenagers now own Their own mobile phone and network service.Teenagers are Engaged on Their mobile phones all the time, no matter on phone calls, using SMS text messages, personalising the mobile phones with ringtones and pictures etc..Â Besides this, many people are running after the lastest mobile phones.Â New models of mobile phones are released almost everyday.Â In order to get up-to-date, people Tend to Change Their mobile phones once in a while.Â These habits Became Among the mobile phone users to spend Them Causing Unnecessary cost on mobile bills and Costs.
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In next ten years we can never expect how revolutionary developments can be made in this industry but still we have discussed and predicted about some developments and scientists and companies are already working on them for example : video calling will be made more easier and cheaper and convenient . Push to talk (PTT) is also a feature is also integrated with mobile phones in the near future. Push to talk is not like a telephone conversation.Â Users will not have to choose to connect.Â It is similar to the idea of a walkie-talkie, but perhaps another user connected to the other end of the world.Â Size and shapes of mobile phones are also playing an important role for the mobile phone.Â Yes, many ideas brought by mobile phone manufacturers are now very fashionable and colorful.Â As regards the volume of mobile phones, concepts such as telephones and mini whist companies. ( Eagar, A. 2001, The Future of Mobile Technology )
Some of the other concepts from the researchers including remote controll a car from a mobile phones, Holophones (mobile phones that project three-dimensional moving images of the users). These concepts are expected to be brought out in the next 10-15 years hopefully. (Dornan, 2000)