Today, smartphone are very useful for our life. It has undergone a long time to perfect as it is now. father of mobile phone is Martin Coosper. It was invented in 1973 and its name was Motorola DynaTAC. The first mobile phone weighs less than 1kg. It was very cumbersome and bulky. Production costs, it was very expensive around 3500 USD. After the first call in 1973, 1783 mobile network s became more widely. Cell phone that day had only function calls. Then, Nokia company in Finland has devised a series of mobile technology later as a text message (1993), ringtones (1998). Janpan is equally developed, they have developed extensive internet service in 1999. It has promoted othe utility functions of this cell phone graphic equalizer. Besider, the use of mobile phones are the major differences between the previous and the present day. Time ago, mobile phone was very rare animals, not everyone has to use. When using the handset, it is still very little functionality. Most people use it just calls, texting. Use it to replace the clock or calendar... The ability to make simple diwn help people work every day. We must recognize that although it was far less smartphones today, but it was a great achievement make humans life was more dynamic.
Posted on: Sun, 07 Dec 2014 13:51:08 +0000
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