scaryjim
I expect far less than you might imagine for small satellites in LEO. After all, NASA offers low cost deployment
CSLI is effectively hitching a free ride on rockets with spare capacity, but the launch profile will be limited to planes dictated by the primary mission, which is roughly equatorial for the vast majority of launches. For the kind of global coverage Samsung is proposing they'll have to have a much more exotic launch profile on their own timetable, that will need their own dedicated launches, which is extremely expensive so they're going to have to pack as many units in as they can, but even still, there's a limit to how many you can get up at a time, they'd probably need 40 launches at least. And the individual units will need their own manoeuvre thrusting systems to handle plane and altitude changes so they can get into position, which in itself will require significant amount of fuel, especially the plane changes, and after all that, it'll need to make adjustments to avoid collisions, and routinely compensate for atmospheric drag. And that's assuming that the world's governments are happy to have these things whizzing across their borders. So orchestrating all that mess wont be simple at all, technically, or politically.
It smells a lot more like a pipe dream, one of many we've heard lately about bringing interwebs to the rest of the planet.