Mobile phone

1.

Mobile phone

2.

Method calls with the use of portable
communication devices, was proposed in the mid20th century Soviet engineer. Leonid Kupriyanovich,
in 1963, was able to develop the first analogue
mobile phone. Since the model was experimental,
convenience it did not have and needed
improvements. Its weight was 3kg

3.

4.

5.

6.

7.

Thanks for watching