I'm sure all of you have a cellphone, but don't you wonder how it is invented?

1921 - when radio is invented, which is one way communication, inventors keep trying the way to do two way communcation by the means of radio.

1947 - Douglas H. Ring and W. Rae Young, in association with Bell Labs proposed the first hexagonal cells for mobile phones. Philip Porter also of Bell Labs was the first to propose a system utilizing cell towers at the corners of the hexagons rather than at the centers. These towers would have directional antennae that would transmit in three directions. Unfortunately these innovations would not have immediate impact until the frequency range spectrum could be increased.

1968 - the Federal Communications Commission (FCC) regulation that limited radio-spectrum frequencies was increased and allowed research into creating better connections. Prior to this the number of simultaneous conversations in a service area was severely limited. The FCC in cooperation with AT&T and Bell Towers established the infrastructure of broadcast towers that allow modern cell phones to broadcast today.

1973 - was the year that Martin Cooper working for Motorola used the idea of the car phone and other associated technology that was needed to make cellular phones possible. Cooper was an electrical engineer educated at the Institute of Technology in Illinois. He began his career at Motorola in 1954, and started out working on handheld police radios.

1984 - the first cellular phones; the Motorola DynaTAC 8000X,weighed 2 pounds and was selling for $3, 995, were made commercially available. Back when phones were the size and weight of a car battery and they were more expensive than the average color TV. The early cellular technology carried with it many health hazards. Cellular phones give off electromagnetic energy which is a non-ionizing form of radiation. This is similar to the radiation produced during thunder storms.

1990’s - ushered the second generation of cellular technology to the forefront. The size and weight of the phones began to diminish and digital signals replaced earlier analog technology. As advances in battery technology, and more energy efficient electronics were made phones continued to shrink making the package more appealing for consumers. In 1991, the Motorola MicroTac Lite was created which cost $1,000

2000’s - shortly after the introduction of second generation technology another technological advance was made to third generation technology. Movement was made towards standardizing a single worldwide cellular standard. The introduction of additional multimedia features was incorporated into phones. Email, internet, and data transfer became a standard feature. Currently the smallest cell phone in the world weighs slightly more than a pack of cigarettes and is 68 X 38.5 X 22 mm

The Future of cellular technology is limitless. It has been suggested that cell phones will eliminate the need for any land based phone systems. The advent of this technological shift will plod rapidly along as technological advances allow mobile devices to be smaller, more versatile and adaptable to almost every eventuality.

hmmm... all i know is the first handphone shape.. haha. very very big and heavy. If someone throw that handphone to you u will be fainted. haha.

now days every one can buy cell phone because the price is not expencive like fwe years ago also cell phone is become primary need now

GBU