A radiotelephone is a communications device that allows two or more people to talk using radio. There is disagreement about the definition of the term. There is a conflict among British English usage, American English usage, and historic use. Disambiguation Archaic use Radiophone was an alternate name for the photophone, an optical telephone invented jointly by Alexander Graham Bell and his assistant Charles Sumner Tainter on February 19, 1880.Jones, Newell. First 'Radio' Built by San Diego… (More on Radiotelephone)