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.
Pavel Golubitzky
Major inventions took place in the 1880s. In 1882 he designed a multi-pole phone. By this time the phone line was already organized in many cities around the world. However, it was of poor quality, and in 1883 at the Munich electrical exhibition of the expert Commission was given the conclusion that the system used "is suitable for the transmission of sound at distances up to ten kilometers."