It's safe to say that I love Garmin's inReach. Whether it's the Mini 2 that saved my life, the newer Messenger Plus, which can send voicemails and photos, or even my early reactions to the new GPSMap H1i Plus handheld. They are, in my opinion, the one piece of gear you absolutely have to adopt if you're going to explore the woods to any degree.
Again, they saved my life, and I'll entrust my continued health and well-being to them whenever I leave cell service, as I know they can take a beating and keep on going. That, however, isn't true about any of the current crop of smartphones offered by any of the big names.
But even the inReachs have their chinks in the armor. At least, a single chink, and that's that you have to grab them from wherever you've attached them to your body.