The first mobile (cell) phone was used yesterday 40 years ago. I am surprised no one here has mentioned it. How technology has changed from all those years ago.
http://www.bbc.co.uk/news/technology-22013228
The first mobile was the DynaTAC 8000X.
http://www.bbc.co.uk/news/technology-22013228
The first mobile was the DynaTAC 8000X.