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The first phone was invented by Alexander Graham Bell. The user would speak into the mouthpiece and the electric current from the sound waves would carry it to the the receiver
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The Rotary was operated by rotating the dial to the number you wanted. This was quite slow and tedious.
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The candlestick was separated into 2 pieces, the mouthpiece and a receiver which was placed on your ear during the phone call.
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This allowed callers to leave a message if the caller couldn’t receive the call.
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The push-button had a keypad to dial numbers which would transmit a frequency to the operator.
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These phones were no longer attached to cords from the phone’s base station.
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The convenience of Caller ID was the user no longer had to memorize phone numbers.
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This was the 1st mobile phone and had the maximum of 30 minute talk time.
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The Motorola StarTAC was the 1st successful flip phone.
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This phone was shaped like a candy-bar and had a long battery life.