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  Alexander Graham Bell invented the telephone in 1876.
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  Bell system companies begin installing switching systems and rotary dial telephones in 1919.
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  The rotary style dial pad been replaced with a cooler dial pad.
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  Teri Pall invented the cordless phones in 1965.
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  Martin Cooper invented the first mobile phone in 1973.
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  The first iphone was invented by the company apple in 2007.