you are correct, inReach devices can text by themselves(with no cell signal) and can be paired with a cell phone to make calls(I have the 66i), but not make calls by themselves.

https://www8.garmin.com/manuals/webhelp/GUID-6E5DFD2E-EEE4-4...

Are you sure of that? I can find no info nor claims of inReach devices doing anything voice-wise, even when paired with a phone.

I think I didn't write that clear enough :) I haven't used mine like this so far.. but you can pair the garmin to a phone(via the connect app) and make a call from the phone using the garmin as an antenna so to speak, you cannot talk or hear anything on it(the garmin inReach).

Can you point me to the docs on that? As far as I knew the inReach is a data-only thing, even when paired to the phone.

That's definitely not a thing.

You can pair the Garmin to a phone. You cannot make calls from that phone over the inreach network.

You've linked to the DriveSmart 66 doc which has nothing to do with Inreach. The DriveSmart is a car computer: https://www.garmin.com/en-US/p/721098