Mobile phone
A
mobile phone is a product produced by human's high technology. It is a
short-range, electronic device used for mobile voice or data
communication over a nerwork of specialised base stations known as cell
sites. Because of the cell phone using, our communication is more and
more close and easier than hundred years ago. Nowadays, cell phone is a
main way for people to keep touch in the society.
This
history of mobile phones chronicles the development of handheld radio
telephone technology from two-way radios in vehicles to handheld
cellular phones. In the beginning, two-way radios (known as mobile
rigs) were used in vehicles such as taxicabs, police cruisers,
ambulances, and the like, but were not mobile phones because they were
not normally connected to the telephone network. Users could not dial
phone numbers from their mobile radios in their vehicles. A large
community of mobile radio users, known as the mobileers, popularized
the technology that would eventually give way to the mobile phone.
Originally, mobile phones were permanently installed in vehicles, but
later versions such as the so-called transportables or "bag phones"
were equipped with acigarette lighter plug so that they could also be
carried, and thus could be used as either mobile or as portable two-way
radios. During the early 1940s, Motorola developed a backpacked two-way
radio, the Walkie-Talkie and later developed a large hand-held two-way
radio for the US military. This battery powered "Handie-Talkie" (HT)
was about the size of a man's forearm 
List of Contents
1. Fuction of mobile phone
2. Brand of mobile phone
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