It probably also improve user experience for those who are not on the overpriced better coverage network (T Mobile? ATT?) where the "good" network has a monopoly (Verizon?).
One of my friend works in a satellite company building these units and explain to me how it works: the satellite array acts like an antenna array with massive MIMO to improve reception and your phone's weak signal will be convoluted into a strong one after processing. This is like your wifi's MIMO but much bigger in scale.
