The FCC gave approval to SpaceX on March 29, 2018, to launch 4,425 satellites into low orbit around the Earth.
The total number of satellites that is expected to be put into low and high orbit by several companies will be 20,000 satellites.
5G will use Phased Array Antennas to shoot Beams of Radiation at Cell Phones
These will send tightly focused beams of intense microwave radiation at each specific 5G device
that is on the Earth and each device will send a beam of radiation back to the satellite. [2]