To obscure the origin of the cell phone a little:

From the Dick Tracy comic strip as early as 1946:



Of course who could forget that later additions to Dick Tracy of Moon Maid [first appeared on 12/29/1963]. Of course that hasn't happened and won't, but there was the space coup



Of course in the non-SF forerunner there were 1950s mobile phones. Well car phones that could be used just as a landline could be.



I'm sure that the Nautilus [20,000 Leagues Under the Sea submarine] was not nuclear powered, but was electrically powered. Real submarines date back to the early 17th Century, but Americans used one in 1776 in an attempt to sink a British war ship.

http://www.history.com/this-day-in-h...bmarine-attack