I worked for the mothership (Motorola) when Iridium was being deployed. Got to tour the satellite assembly facility. There was some truly groundbreaking engineering going on. But there was no real marketing plan. Build it and they will come. Except. No, Iridium phones did NOT work anywhere on earth. Not inside. Not in a car. So, not a cell phone replacement for international worker bees, like I was. Too bad. I had to carry 3 phones (U.S., Korea, Europe/Asia).
But the tech! Wow. I thought pretty highly of my engineering skills, but I was IMPRESSED. The trick was making the satellite constellation look like a standard PSTN (Public Switched Telephone Network). That allowed them to use off-the-shelf PSTN gear. F'ing brilliant, that black box was (one at each earth station). Oh. And they were able to assemble a satellite in 30 days, in a horizontal position. NASA insisted that over 220 days were required, and that it had to be assembled in launch (vertical) position. Wrongo!
Unfortunately, Iridium was just another nail in the coffin for the original Motorola.
At least my pension is with the remaining piece of the original company (public safety and military/space comms). Those checks ain't never gonna bounce!