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The idea appeared in Samuel Morse's mind when he listen a conversation about electromagnetism.
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The telegraph used Morse code, a really simple code that used dots and dashes. It could easily be implement in the technology of that time, closing briefly for a dot and keeping longer for a line.
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Morse did the first public demostration sending a message from Washintong to a railway in Baltimore. The first sentence sent was "What hath God wrought?"
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It allowed people to send several messages using the same cable. Also a submarine cable made possible the communication between Europe and America. (1866)
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In 2002, Meucci was recognized as the first one to transmitted the human voice across a distance using an electronical device in 1860.
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Alexander Graham Bell obtained the telephone patent after winning in the court. Is thanks to him that the telephone was industrialy produced, popularised and improved.
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The first handheld cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a handset weighing 2 kilograms.
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It weighed 1.1 kg and measured 22.86 cm long, 12.7 cm deep, and 4.44 cm wide. It offered a talk time of about 20 minutes and took 10 hours to recharge. The only problem was the difficult to hold something of that weight and size to an ear for more than 20 minutes.
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This is a curious picture where we can see a man speking with a mobile telephone near a telephone box.
