When was the first cell phone invented?

<p class="MsoNormal">Here is the history of cell phone which you can answer your sons question.</p> <p class="MsoNormal">Doctor Martin Cooper invented the modern cell phone. He invented the technology responsible for the cell phone. Dr. Martin Cooper is also known as the first person to make a call on a cell phone. His revolutionary call took place in April of 1973 in New York.</p> <p class="MsoNormal">But even before Dr. Cooper made his invention cell phone had a history even before that.<span>&nbsp; </span>The first fully automated cell phone system MTA (Mobile Telephone system A) was launched in Sweden in 1960. It allowed calls to be made and received in the car using a rotary dial.</p> <p class="MsoNormal">Calls from the car were direct dial, whereas incoming calls required an operator to determine which base station the phone was currently at. It was developed by Sture Laur&eacute;n and other engineers at Televerket network operator. Ericsson provided the switchboard while Svenska Radioaktiebolaget (SRA) and Marconi provided the telephones and base station equipment. In 1962, an upgraded version called Mobile System B (MTB) was introduced.</p> <p class="MsoNormal">This was a push-button telephone, and used transistors and DTMF signaling to improve its operational reliability. In 1971 the MTD version was launched, opening for several different brands of equipment and gaining commercial success.&nbsp;</p>