history of communication by Pedrinho Freitas dos santos https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1 en-us 2023-05-06 16:34:30 UTC 2025-11-07 22:24:54 UTC hello@padlet.com When did cell phones appear? freitasdossantospedrinho https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581092529  The history of cell phones began in 1973, with the first launch of a device designed by electronic engineer Martin Cooper. However, at that time, the equipment was huge, heavy and cost a great deal of money. Like the first Motorola, the DynaTAC, from 1974.]]> 2023-05-07 21:34:27 UTC https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581092529 In what year did cell phones have internet access? freitasdossantospedrinho https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581095327  3G - 2000. At the end of the 2000s, the use of the third generation of wireless networks for mobile devices began. It was this new type of connection that enabled the transformation of cell phones into smartphones.]]> 2023-05-07 21:42:21 UTC https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581095327 1973-2000 freitasdossantospedrinho https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581095479 other versions of cell phone in the past

]]> 2023-05-07 21:42:49 UTC https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581095479 How did the cell phone appear in Brazil? freitasdossantospedrinho https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581098004  Brazil's first cell phone The first cell phone that landed in Brazil was also launched by Motorola, in 1990. Right away, the Motorola PT-550 was nicknamed “brick”. The model brought users an external antenna on top of the device.]]> 2023-05-07 21:49:03 UTC https://padlet.com/freitasdossantospedrinho/v9ccyxpk8u6x12n1/wish/2581098004