The first video talks about the different operative system and devices which smart phone dispose, network, touch screen, battery, business model...
Then talk about the data aplication and the bps.
For finish talk about the interference in networking.
The second video talks about the different centuries of cellular network and its characteristics.
The first centuries was in 1940 and cellphones go with terrestrial wireless communication.
The second centuries was in 1970 and cellphones and this has got four generations.
The third centuries was in 1990 and appear the WiFi networks.
For finish talk and explain a little bit about the calculus for see the velocity of network.
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