Development of the Phone

By cyates89
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    Creation of the Phone

    In 1876, Alexander Bell invented the telephone. The telephone was made of an iron diaphragm, two electromagnets. and a horseshoe magnet.
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    signal innovations

    In 1900 the telephone was able to call across major cities and was innovated to not prevent the loss of signal.
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    ATT Innovations on the cell phone

    In 1949 ATT made the first phone with a ringer and a headset.