<P> Before the devices existed that are now referred to as mobile phones or cell phones , there were some precursors . In 1908 , a Professor Albert Jahnke and the Oakland Transcontinental Aerial Telephone and Power Company claimed to have developed a wireless telephone . They were accused of fraud and the charge was then dropped , but they do not seem to have proceeded with production . Beginning in 1918 , the German railroad system tested wireless telephony on military trains between Berlin and Zossen . In 1924 , public trials started with telephone connection on trains between Berlin and Hamburg . In 1925 , the company Zugtelephonie AG was founded to supply train telephony equipment and , in 1926 , telephone service in trains of the Deutsche Reichsbahn and the German mail service on the route between Hamburg and Berlin was approved and offered to first - class travelers . </P>
<P> Before the devices existed that are now referred to as mobile phones or cell phones , there were some precursors . In 1908 , a Professor Albert Jahnke and the Oakland Transcontinental Aerial Telephone and Power Company claimed to have developed a wireless telephone . They were accused of fraud and the charge was then dropped , but they do not seem to have proceeded with production . Beginning in 1918 , the German railroad system tested wireless telephony on military trains between Berlin and Zossen . In 1924 , public trials started with telephone connection on trains between Berlin and Hamburg . In 1925 , the company Zugtelephonie AG was founded to supply train telephony equipment and , in 1926 , telephone service in trains of the Deutsche Reichsbahn and the German mail service on the route between Hamburg and Berlin was approved and offered to first - class travelers . </P>
when did the first portable phone come out
when did the first portable phone come out
1924
1924