I've been using an old Garmin Inreach SE for years and generally it's been rock solid, aside from occasional bluetooth disconnects (which are fixed by toggling bluetooth Off/On on my iPhone)
On this latest trip however, I had a bit of a scare. On day 2 of the trip, I realized at one point that Earthmate had lost bluetooth contact with the Inreach. I then realized the device appeared to be powered off. The battery had been at 90% when I last checked, so this made no sense.
No amount of pressing the power button, using a variety of USB power bricks or micro USB cords could get it back on.
I gave it to my wife who is the smart one, and she finally realized that there are instructions on the back (which had been almost rubbed off) which say to press the X button and Down button until the device resets.
In hindsight, it's almost sure that the Inreach overheated - it was a warm day (85F) and we had left it sitting in direct sun on a hot rock for several hours.
Another lesson: what to do if your inreach fails? We were not so much worried about our own personal safety, but more about our friends & family back home, and scaring them. For the next trip, we'll make sure we have a "What if we lose contact" contingecy plan.