History of mobile phones

Today, the mobile phone is over 80 years old when the hand-held radio transceivers have been utilized since the Second World War. Although the history of mobile phone is very short, it can be divided five segments, 0G, 1G, 2G, 3G and 4G.( Generation)

During the war Reginald Fessenden invented shore-to-ship of video telephony which linked the radio system of army.  By 1930, telephones customers could contact passenger who lived in USA by radio on an ocean liner. In the 1940s mobile telephones were available for some telephone company.  However, the device was very bulky and it took a large of high power. Also, it was complex when you use it.

In 1947 the Mobile Telephone Service became commercial by AT&T.  By 1948, the company offered Mobile Telephone Service for 100 towns and highway corridors, and it used the technology of 0G.  The 0G technology is similar to the 1G. The common feature is that they both can communicate with other people by radio, but the difference between them is equipment.  The mobile telephone of 0G which be installed in the bus or car, because the equipment of Mobile telephone weight about 80 pounds.  No one can really be “mobile”.

Prior to 1973, mobile telephony was limited to volume and weight.  On April 3, 1973 Martin Cooper, a Motorola researcher, improved the mobile phone and made the first handheld phone.  According to the date of Wikipedia the prototype handheld phone used by DR. Cooper, and it weighed 2.5 pounds and measured 9 inches long, 5 inches deep and 1.75 inches wide.  The first analog cellular system was Advanced Mobile Phone System which was deployed in North America.  This was called 1G.

In the 1990s, the 2G mobile phone systems were set up, and most of it only offered service on voice communication.   The difference between the previous generation and the second generation is that the former was using analog transmission rather than digital.  The ‘second generation’ was superior to the previous generation in all aspects.   The result was that the global market was taken up by two systems, the GSM and CDMA.

With the 2G mobile phone got more and more popular, customers’ demand grew quickly.  For example date service, it means access to the internet.   Subsequently, we saw the advent of 3G.  This differed from the 2G by using packet switching instead of circuit switching for data transmission.   By the end of 2009, about 9 percent of worldwide subscribers used 3G.

By 2009, it is clear that the 3G has overwhelmed with the increasing body of bandwidth-intensive applications.  Subsequently, it stimulated people developing 4G technology which improved the speed over 10-fold than 3G.  Nowadays, people could connect the internet and transmit date more quickly.  The difference from the 3G is that the 4G utilizes an all-IP network instead and eliminates the circuit switching.

Nowadays, more and more people enjoy using iPhone.  On September 12, Apple announced about the iPhone5 was released.  The newest iPhone has been apparently improved with installing IOS6 operating system.  Comparing to previous version, iPhone5 provide the faster speed of the connection Internet, the supports panoramic photos up to 240 degrees, the new way of sending text by voice, the caption of incoming calls and other functions.  However, following the extraordinary functions for us are some bugs in IOS6.  For example the incompatibility of software and an unintended purple hue when you take pictures.  All in all, Apple also needs to do many things to improve their production.

In the future, it must be appearing the new communicational technology and it could be named 5G, 6G and more.  I think the mobile phone could be designed liking watch, lighter and other, and it could transmit data over 1G/s.  Even we can contact other guys without launching tower.

Reference:

http://en.wikipedia.org/wiki/History_of_mobile_phones

http://en.wikipedia.org/wiki/IPhone_5

http://www.huffingtonpost.com/denise-gosnell/iphone-5-review-the-top-1_b_1927858.html

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