What's the difference between a satellite phone and a 3G phone?

satellite phone

and

third generation

The difference between telephones is that:

Satellite phones rely on global satellites.

Communication system

To do the data

trait

Image transmission, seamless network.

3G mobile phones rely on

ground

base station

It was transmitted by Jingxing.

The principle of early telephone is that sound is a compound vibration in the air, which can be transmitted to.

solid

Go, pass

electric pulse

Transfer on conductive metal. Bell applied for the telephone patent in March 1876.