Note that it will require the local phone company to have rights to the necessary spectrum for each Starlink cell involved. Also, the total bandwidth per cell is going to be fairly small - meaning not much data per user, but texts and phone calls should be possible.
But the same applies to satphones, so as you say - end of satphones, at least within Australia, and potentially everywhere. But it will be a little while, and there is going to have to be a bit of sorting out of spectrum. For example, if Telstra has the right to use the necessary spectrum for their local tower, Optus users cannot use it for Starlink.
There are also likely to be legal issues - data is going to have to come back to Australia to allow the various legal requirements to be met (such as blocking banned websites and metadata retention etc).
And it will be at least next year - depends on Starlink 2 satellites, which are sort of dependent on the Starship booster, which has not yet flown to orbit and is having environmental issues with their launch site. (They can be launched on the F9 or falcon heavy, but apparently need modifications, which would be unnecessary expense if the Starship launches as planned, so probably won't happen.
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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