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Alexander Graham Bell was working on a telegraph improvement, that become the phone, when he started creating the gadget that we cannot live without it. -
Is a system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals. -
Candlestick phone was divided into two pieces: one part was to spoke and the other one to listen. -
Rotary phone became popular in 1960 because of the facility of calling people and speaking and listening to the same part.
Push-Botton phone was launched three years later and it made marking numbers easier. -
In 1984, Motorola DynaTAC 8000X, it became the first commercially available handheld cellular mobile phone and its price was 3,995$ -
Phones have been developing very rapidly in the last decade. Nowadays people can buy a simple smartphone for less than 100$ or a complex one for 1,400$.