It’s better for OP to explain, but from what I read they don’t mind it being used in a collective work, but they want to make sure that collective work will also be CC-BY-SA. What from what they read it is no guarantee.

I honestly went into the post just to make sure my eyes were not deceiving me. It’s very good news indeed!

You can use a VoIP or SIP provider and then to send SMS and MMS messages you can install an app called Chatty: https://flathub.org/apps/sm.puri.Chatty