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acoustic string telephone
Robert Hooke creates an acoustic string telephone that conveys sounds over a taut extended wire by mechanical vibrations
https://en.wikipedia.org/wiki/Timeline_of_the_telephone -
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two way radio
Bell makes the first two-way long-distance telephone call between Cambridge and Boston, Massachusetts.
https://en.wikipedia.org/wiki/Timeline_of_the_telephone -
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mobial phone
http://www.softschools.com/timelines/cell_phone_timeline/28/ .The first service created just for mobile phones opened up in St. Louis, MO, but the service didn't work well and it didn't last. -
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first iPhone
https://www.google.com/search?q=when+was+the+iphone&oq=when+was+the+iphone+&aqs=chrome..0j69i57j0l4.8375j0j8&sourceid=chrome&ie=UTF-8
it was the first touch screen iphone -
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i phone 6
https://www.google.com/search?q=iphone+6&oq=i+phone+6&aqs=chrome.1.69i57j0l5.7175j0j7&sourceid=chrome&ie=UTF-8#safe=strict&q=iphone+6+release+date
The iPhone 6 and iPhone 6 Plus are smartphones designed and marketed by Apple Inc. -
