The fact of connecting a ham radio station to a telephone network exists from the beginning of the ham radio operators, even commercially, as the case of Carterfone (with lawsuits filed by the companies to which it was connected), but it was not possible to talk about mobile telephony until the arrival of the cellular network AMPS, initially using a car phone as the cellular terminal, and finally with the arrival of the DynaTAC the first mobile phone "properly talking" (being able to hold the whole unit in the hand).