In extremely rural environments? Possibly. Globally, as an alternative to traditional cellular service? Literally impossible as long as cost is the forcing fact

In extremely rural environments? Possibly. Globally, as an alternative to traditional cellular service? Literally impossible as long as cost is the forcing factor. I'd recommend reading up on RF information theory and then thinking about the cost/bandwidth implications. Satellite-based cellular is never ever ever going to be competitive with locally deployed terrestrial infrastructure in urban environments.