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| 1964 || Pre-cellular [[w:Very High Frequency|VHF]]/[[w:Ultra High Frequency|UHF]] {{w|radio}} system launch || {{w|Improved Mobile Telephone Service}} (IMTS) is introduced by {{w|AT&T}} as a replacement to {{w|Mobile Telephone Service}} (MTS) and improved on most MTS systems by offering direct-dial rather than connections through a live operator.<ref name="Mobile telephone britannica">{{cite web|title=Mobile telephone|url=https://www.britannica.com/technology/mobile-telephone#ref1079050|website=britannica.com|accessdate=25 July 2017}}</ref> ||
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| 1965 || Network technology || {{w| AT&T }} introduces the first major improvement to mobile telephony, creating the Improved Mobile Telephone Service, which allows more simultaneous calls in a given geographic area, introducing customer dialing, and reducing the size and weight of the equipment.<ref name="A BIG CHANGE FOR HUMANITY">{{cite web |title=A BIG CHANGE FOR HUMANITY |url=https://phoneevolution.wordpress.com/ |website=phoneevolution.wordpress.com |accessdate=27 August 2019}}</ref>||
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| 1968 || Network technology || {{w|Bell Labs}} starts developing the {{w|Advanced Mobile Phone System}} (AMPS) standard.<ref name="Introduction to the History of Computing: A Computing History Primer"/> || {{w|United States}}
