Thats the question, Warin
When you use an normal PLB, yes, you dont know what happen, how soon you get help, if you get help in the middle of congo.
With an two-way messager like the Delorme InReach you see what the GEOS
(Behind every inReach is GEOS. Behind GEOS is the IERCC — formally known as the International Emergency Response Coordination Center)
can do for you on your current location.
If you push the SOS button, the GEOS get the alarm, and up to 3 contacts you can define by yourself. And for shure you can too send emails to any person you like.
Depending on your problem (breakdown, biten by a snake, crash) or whatever - they will decide how they can help you.
A Satphone looks to be better, but do you have get a contact list for each country to optain help - the Sat-Messager is a no brainer - press SOS and when it is possible to get help - they will do their best.
Today is much more possible than you may guess. Flight in an mechanic to your car with a breakdown? Somewhere in Congo? There are companys who offer that stuff (tuffstuff from SA). Same with sending an doctor with an airplane.
For shure you have to be able to push the SOS (in case of an accident you may not be able to do it) - but i think it is a cheap insurance for small oder medium worst case szenarios..
Like showed here, you can start to chat with GEOS in an SOS Situation, so they dont have to flight in a doctor, when you have other problems than medic ones: