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Q.

When The first public cell phone call was made ? By whom ?

Tags: electronics, science, technology
Asked by anantharaman, 03 Jan '10 08:33 pm
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Answers (4)

 
1.

Dr Martin Cooper, a former general manager for the systems division at Motorola, is considered the inventor of the first portable handset and the first person to make a call on a portable cell phone in April 1973. The first call he made was to his rival, Joel Engel, Bell Labs head of research.
Answered by heymath, 03 Jan '10 08:35 pm

 
  
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2.

In the United States, interconnection of mobile radio transmitters and receivers (transceivers) with the PSTN began in 1946, with the introduction of mobile telephone service (MTS) by AT&T. The MTS system employed frequencies in either the 35-megahertz band or the 150-megahertz band. A mobile user who wished to place a call from a radiotelephone had to search manually for an unused channel before placing the call. The user then spoke with a mobile operator, who actually dialed the call over the PSTN. The radio connection was simplexi.e., only one party could speak at a time, the call direction being controlled by a push-to-talk switch in the mobile handset.

In 1964 AT&T introduced a second generation of mobile telephony, known as improved mobile telephone service (IMTS). This provided full-duplex operation, automatic dialing, and automatic channel searching. Initially 11 channels were provided in the 152158-megahertz band, but in 1969 an additional 12 channels were added in the 454459 ...more
Answered by KARTIKAY SHARMA, 03 Jan '10 08:47 pm

 
  
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3.

Dr Martin Cooper, a former general manager for the systems division at Motorola, is considered the inventor of the first portable handset and the first person to make a call on a portable cell phone in April 1973
Answered by Avtar Khalsa, 04 Jan '10 04:13 pm

 
  
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4.

Cooper made the first call on a portable cell phone in April 1973
Answered by saranathan Narasimhan, 04 Jan '10 04:12 pm

 
  
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