>>1714998PLBs/EPIRBs that run on the SARSAT network is restricted in a lot of countries.
Some only allow them to be used for maritime rescue (and it needs to be registered to a specific boat call-id), and other countries requires a license or an approved application if you want to use them.
So a satphone or satcom/locator with a subscription like Spot, garmin inreach, iridium etc. may be the only option you have, dependant on location.