Satellite SOS and 911 with new phones

I've signed up for the Wakely Dam 55K, which is particularly remote. I will almost certainly be completely alone for 90% of the race. Rather than getting a garmin inreach, I was looking at the new Satellite SOS and 911 capabilities of some of the newer phones. Verizon tells me that even my prepaid plan can use it, I just need to upgrade from my Samsung S24 to at least an S25.

Anyone have any experience with that?

Edit: I bought the S25, had mixed experience. First, you need a clear sky. I had zero luck in the woods. In one location I was on a dirt road while running in Vermont, never got a signal. Possibly not patient enough, it was the first time I tried it. 2nd time was further north in NY. In a small parking lot and at the edge of a lake I got a signal and could send texts. It isn't fast, and you have to use the right texting app and continually point the phone in what seems to be a constantly moving part of the sky, but it does work.