I don't know anything about the technical details with this, but I wonder why mobile service providers don't just kill off regular SMS and calling, and start pr

I don't know anything about the technical details with this, but I wonder why mobile service providers don't just kill off regular SMS and calling, and start providing service exclusively through data connections? The infrastructure for that old stuff can't be free for them, there must be some significant costs associated with it. Maybe Starlink will be able to provide a mobile phone service that only offers a data connection one day, and that will be the "disruption" the mobile industry needs.