History of mobile phones
A cellular telephone switching plan was described by Fluhr and Nussbaum in 1973, and a cellular telephone data signaling system was described in 1977 by Hachenburg et al.
Innocenzo Manzetti
Suggestions of the alleged intellectual property theft appear unsubstantiated, as there were no historical records of English technicians or companies implementing 'speaking telegraphs' in the U.K., or elsewhere, in that time period. The United Kingdom did not see its first telephone demonstrations until A.G. Bell demonstrated one of his early devices to Queen Victoria and others in 1877. Well documented sources record that Bell first conceptualized and invented electrical telephony in Canada in July 1874, and did not actually build a working model until March 1876, thus mooting the suggestion of the invention's theft from Manzetti by Bell or others although contacts between Bell and Meucci prior to Bell's patent filings are confirmed.