Presented by Duangta Joel Engel Richard Frenkel Today’s communications industrial would not be what it is, with out these two persons In 1947 AT& T Bell.

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We use our telephone or cell phone everyday. It is a faster way to communicate with our family, friends, or people. And if you have an emergency to call.
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Presented by Duangta

Joel Engel Richard Frenkel Today’s communications industrial would not be what it is, with out these two persons In 1947 AT& T Bell Labs introduce the Idea of cellular communication In 1970’s AT&T Labs and Motorola : Incorporate the phone Technology into portable devices.

Dr. Martin Cooper is the inventor of first portable handset and made the first phone call in April 1973 The first cell phone 1973 Motorola Dyna Tac 8000 Size 9 x 5 x 1.75 inches Weight 2.5 pounds No display, talk time 35 minute Recharge time 10 hours Features: Talk and listen only The first cell phone 1973 Motorola Dyna Tac 8000 Size 9 x 5 x 1.75 inches Weight 2.5 pounds No display, talk time 35 minute Recharge time 10 hours Features: Talk and listen only

G1 ( First Generation ) Analog System Hexagon cell base station

2 G (Second Generation)  GSM System  SMS  Some Function

3 G (Third Generation)