Will be a bit terse as stupid me slipped on ice and landed on my hands... luckily nothing broken it seems.
Satellite worked! Was so amazing. Even in the car before going out for the hike, it connected. A little satellite replaced the network bars. Got an SMS from T-Mobile that I connected to satellite. Google Maps notified me "Using satellite network" with some low perf warnings.
I was able to send WhatsApp messages and photos and ultimately made a short voice call. At that point was in a deep forest with no clear sight of the sky and was walking and it worked poorly but still worked. Insane to think I have a GrapheneOS satphone now!