And the user obviously has to be in range of the satellite.
According to Wikipedia this makes the phones useless in isolated areas, so this about as useful! As a bunch of towers,
With every post you make yourself seem more ridiculous than ever.
Of course the
"user obviously has to be in range of the satellite". Any child would know that.
If the user were not in range of the satellite the user could not connect to that satellite!

Though in the case of the Iridium system a satellite can connect to the ground station via other satellites, so each satellite does not need to be itself in range of a base station.
I fail to see why
YOU can't research this yourself and not appear so completely ignorant on the subject!
Please explain just how "this makes the phones useless in isolated areas"!
ONE SATELLITE covers the whole area of Australia! This is a coverage map of the Optus D3 satellite. As far as I know this is primarily for Satellite TV, but Optus also provides Satphone services.
Coverage Map Optus D3 Satellite That satellite is located over the equator at 156° E (Just to the NE of New Guinea) and the green line shows the aiming direction from Hobart in Tasmania and is not the only satellite serving Australia (in addition to the Iridium system that Telstra utilises).
And in case you wonder if Australia needs Satellite Phones, here is the mobile phone (cell-phone) coverage map for Telstra over Australia (and no other carrier covers it better).
Telstra Coverage Map of Australia So you see there are large areas without coverage from land based towers.
I suspect parts of Asia and Africa have poorer coverage.
I don't know how many SatPhone satellites there are, but
Iridium has 72 Operational (66 in active service 6 spares) in Low Earth Orbit plus
numerous Geostationary satellites providing Sat Phone services and Satellite internet.
If you are interested, you can look up more yourself!