History of mobile phones

Used by Motorola in the U.S. Army during World War II "Walkie Talkie", and called its predecessor.

But this is not using the line transceiver.

Cell phone plan was not long since the phone has been developed. Can communicate using radio waves, was portrayed as a dream to talk to each other in speech and human. Morse Code for wireless telegraph was the underlying technology of mobile phones, so popular that it would even be explosive for practical use was not considered at this time.

The specific research to develop mobile phones that have been done to the old problem of battery problems and the noise signal to become very large due to many problems such as the phone baud rate also was not feasible.

In the 1960s and was small enough to be able to talk while holding hands. But still heavy, they were tired of short calls. Was able to shrink the size of a hang with one hand will be 1970. This was exhibited as a Waiaresuhon Exposition held in Osaka, Japan in 1970. This is what is now called cordless phones. Business began to become established as the 1980s, car phones in some developed countries (mobile telephone) as wireless phones, and service was started. Compared to this time introductory price of the phone and fixed communication cost is several dozen times, both have been limited to urban areas and communication area, if there is no compelling reason not introduced. In 1978, "AT & T" and "Motorola" get permission to practical experiments. In 1979, the world's first commercialized in Japan. In 1981, Bahrain and practical application in Scandinavia. The direct appeal from Motorola in 1981 to the late President Reagan also took the United States, was made practically.

Which are widespread in the 1990s and began to be equipped with liquid crystal display unit. The mid-1990s has shifted from analog to digital communication system and music can set your favorite ring tones ring tones, messaging services can now use the pager and solidarity. In the late 1990s is now ready for connection to the Internet network, improves communication speed, it became possible to use images and other Java games with.

Third-generation mobile phone appeared Entering the 2000s, television also has enabled phones were able to perform high-speed data communications and PC connectivity. Explosive beginning to spread in developing countries, the British research firm, "Informa Telecoms & Media" November 29, 2007 (UK time) According to the announcement, we have 50 percent penetration rate in the whole world a [2].