Originally Posted by
blue2002
You cannot use SMS over the internet. You can use Messages by Google (which uses RCS) ... over the internet.
That's false.
Due to some strange combination of incompatibilities, you cannot use Messages for web (
https://messages.google.com/) with Google Fi unless you disable RCS on your account.
I send about 90% of my SMS on my laptop, (obviously) without a cellular connection.
Let's not even get into SMS gateways in general...
Or the fact that basically every cell provider allows calls/SMS over wifi, which definitely works at 35k feet with the cellular radio off.