<P> The history of mobile phones covers mobile communication devices that connect wirelessly to the public switched telephone network . </P> <P> While the transmission of speech by radio has a long history, the first models that were wireless, mobile, and also capable of connecting to the standard telephone network are much more recent . The first such devices were barely portable compared to today's compact hand - held devices, and their use was clumsy . </P> <P> Along with the process of developing a more portable technology, and a better interconnections system, drastic changes have taken place in both the networking of wireless communication and the prevalence of its use, with smartphones becoming common globally and a growing proportion of Internet access now done via mobile broadband . </P>

When was the mobile phone invented and by whom