I think that SpaceX's Starlink Satellite constellation is (by far) the most interesting satellite constellation that corelates with telecommunication services. Since most Telecommunications Satellites are Geostationary (They stay in one place as the earth rotates 360° in a solar day), Starlinks are LEO, or Low Earth Orbit.
Although most Satellite Engineers would find this impractical, I think the close-knit constellation is really something to applaud over. I dream of a day where they make an entire ring and geostationary orbit is no longer a nuisance due to 100% signal coverage!
