> If you have an android phone yourself, maybe it's not actually SMS and it's actually RCS[1]?
And, in my experience, Android pushes you heavily to enable RCS; every time you open its messages app, there's a chance that it will randomly ask you to enable it, with a large button to enable and a small link to dismiss the dialog without enabling. I never tried, but I expect that once enabled, it'll never ask again, so it might have been enabled by accident sometime in the past.
And, in my experience, Android pushes you heavily to enable RCS; every time you open its messages app, there's a chance that it will randomly ask you to enable it, with a large button to enable and a small link to dismiss the dialog without enabling. I never tried, but I expect that once enabled, it'll never ask again, so it might have been enabled by accident sometime in the past.