15 December 2009

History of mobile phone

In 1973, Martin Cooper, a Motorola researcher and executive is considered to be the inventor of the first practical mobile phone for hand-held use in a non-vehicle setting. In 1984, Bell Labs developed modern commercial cellular technology, these looked more like a shoulder bag- consisting of a box with a phone, antenna and power pack- weighed around 5kg. From that time, the mobile phone stepped up into world history's stage and entered the human life. With the rapid advance of science and technology, many people all had the phone, the phone use more and more are also common, and hunderds of phones pushed into the market.

I will show you a vedio about history of mobile phone from the Youtube.

1 评论:

Leon said...

doing good!!

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