By out in the middle of nowhere, you would have to not be able to connect to any carrier network at all. If you are a Verizon customer and can’t get Verizon signal, but you can see an AT&T tower, you will connect to it to make 911 calls, or a T-Mobile tower, if that’s the one you can see. It doesn’t matter. Every carrier has to carry 911 calls for every other carrier.
not always, when I’m out in the middle of nowhere, I also see sos
By out in the middle of nowhere, you would have to not be able to connect to any carrier network at all. If you are a Verizon customer and can’t get Verizon signal, but you can see an AT&T tower, you will connect to it to make 911 calls, or a T-Mobile tower, if that’s the one you can see. It doesn’t matter. Every carrier has to carry 911 calls for every other carrier.
Also iphones I think use satellite for SoS capability now if no cell
I know my Pixel 9 can too.