I saw this Zoleo satellite communicator that also seamlessly integrates with WiFi and mobile cellular for messaging and email :
https://www.zoleo.com/en-au/
It costs $345 for the unit and then a monthly subscription (minimum $32) that can be suspended after the first three months. There's also a $40 initial activation fee. It uses the iridium satellite system in remote areas so should be good for remote communications.
A quick look suggests it provides basic SMS and e-mail facilities only and costs about $350 per year plus other bits.
If you seek an emergency solution then a PLB may be a better option.
If you seek the ability to send a check-in-ok message and a PLB facility then a Spot Messenger may do the job.
If you seek more comprehensive comms then maybe a satellite phone.
In my opinion emergency comms. devices should be as basic and simple as possible - a PLB does that job. The last thing you want in an emergency is trying to Bluetooth your phone to some other bit of kit and hoping they do what they should in the torrential downpour which has trapped you on the wrong side of the river with the water rising!
I have Amateur Radio which lets me do most things but my final fallback is a PLB.
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"I beseech you in the bowels of Christ think it possible you may be mistaken"
Oliver Cromwell, 3rd August 1650 - in a letter to the General Assembly of the Kirk of Scotland
