Cell Phone History
1835 - Telegraph
Samuel Morse created an electric telegraph using electromagnet
1876 - First telephone call
Alexander Graham Bell made the first telephone call,
"Mr. Waston, come here, I want to see you"
1946 - MTS (mobile telephone service) introduced by AT&T
Car-phone and push button talk phones
Single transmitter on a central tower and few channels
limited numbers of callers at a time
1947 - D. H. Ring from Bell Labs created Hexagonal cells and created
cell towers to receive and transmit multiple signals
1970 - Amos E. Joel Jr., Bell Lab engineer, created "call handoff" that allows a
mobile phone to travel through several cell areas during one
conversation without being disconnected
April 3, 1973 - Dr. Martin Cooper, Bell Lab employee, made the first
phone call in New York with the Motorola DynaTAC, 1G.
First handheld mobile phone on the commercial market
1990's - 2G introduction of GSM, Global System for Mobile communications,
digital AMPS, IS-136, ect...
The introduction of 2G came with text messaging
and digital circuit switched data.
The development of computer chip.
2000's - 3G introduced IMT-2000 standardization processing and many new
networks were created.
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