There are PLBs which are supposed to be more reliable than satellite messengers. But I like the idea of inReach more since can send messages telling the respond

There are PLBs which are supposed to be more reliable than satellite messengers. But I like the idea of inReach more since can send messages telling the responders the situation, friends where you are going, friends to send lesser help, or friends to not call authorities when late. There are more than emergencies that happen outside of cell range. Another thing to mention is have GPS and maps. It is good to have backups whether hiking GPS and/or paper maps and compass. If using phone, keep it charged and have battery charger. Finally, be prepared for the conditions. Carry the essentials while hiking. Carry lots of water in desert. Carry water in car. The Germans would have been in much better shape with lots of water in car.