The First Mobile Phone
The first fully automatic mobile phone system, called MTA (Mobile Telephone system A), was developed by Ericsson and commercially released in Sweden in 1956. This was the first system that didn’t require any kind of manual control, but had the disadvantage of a phone weight of 40 kg (90 lb). MTB, an upgraded version with transistors, weighing 9 kg (20 lb), was introduced in 1965 and used dual-tone multi-frequency signaling. It had 150 customers in the beginning and 600 when it shut down in 1983.
The handsets division of Ericsson was given a fresh … Continue Reading..