Undoubtedly. But a handset will only operate where a cell signal is available; Iridium will operate anywhere on the planet, so long as you have line-of-sight to the sky.
I think he meant iridium handset but I could be wrong.
He did mean that, but it wouldn't help - voice calls are very expensive on Iridium.
Last I checked (~2 years back) it was 7$ / minute.
Well if you are stranded half way across The Sahara, I think you'd fork out $7
For data you can get an unlimited plan (includes SMS) for $150/mo.