Mobile Phone

From analog phone to 2G digital network, from GSM.WCDMA. CDMA2000 to TD-SCDMA, the international mobile network has been developing for more than 20 years. Nowadays. it is needed by every citizen in normal life. Probably you cannot imagine that 20 years ago, mobile phones were owned by the rich in their luxury lives. But that is truth in history. Let us just see it.

Basically we can divide the development of mobile phones in three parts which are 1G, 2G and 3G. The first approved mobile phone is Motorola DynaTAC which was made in US in 1983 as a breakthrough in the history of mobile phones. It represents that we’ve entered 1G generation. In that period. the 1G mobile phones had huge size and a square appearance which were looks like a big box. These mobile phones has lots of standards such as NMT，AMPS，TACS, but basically it just supports voice mail， the connection is quite unstable and lack of security protection，and the wireless internet service was not efficient enough either. After that, we got 2G mobile phones which is the most familiar mobile phone. Normally these mobile phones are used on the GSM cdmaOne or PHS standards which are completely developed. Besides this, they also have stable mail quality and appropriate stand-by time. Therefore, It’s widely used nowadays. The further technology is 3G. 3G is short for 3rd Generation which means the third mobile communication technology. The main differences between third and second generation are improvement in the transmission of data and sound. it can deal with images， music，videos and other variety of media forms. It also offers wed site, telephone meeting, E-commerce and other information services. Although it is much better than 2G, there are still many countries do not have universal 3G.

That is basic development of mobile phones and nowadays everyone need a mobile to keep in touch with relatives, friends, colleagues, almost all of people who have relationship with him. But not only that we can use it to get more communication with other people, it also has a lot of useful functions, for instance, you won’t get lost because your mobile phone has a global positioning system to find your position in electronic map which is shows on your mobile screen. Furthermore, you can use it as a handheld game console, a mp4, a dictionary and a camera. It can be a lot of things useful.