One of the already-announced features of the Gen 2 satellites is the ability to connect directly to standard 4G LTE handsets to send emergency messages (similar to the SOS feature on the latest iPhone, but not limited to any specific phone model). In the US they will be partnering with T-Mobile to offer the service (probably using their band 25 spectrum).
The coolest part of the SpaceX/T-Mobile one isn't limited to emergency messages. Not that it'd be a particularly great experience but you're able to use it to say "I'll be back 4 hours early, decided not to do the longer trail" or whatever.
https://www.androidauthority.com/t-mobile-starlink-satellite...