I run GrapheneOS and can send RCS to both Androids and iPhones mostly without issues. But then, my GrapheneOS is still the actively supported version, so I don’t know what will happen in a few years.
The only reason I have Google Messages is for RCS.
dorumon@lemm.ee 4 days ago
I am also running the latest version of GrapheneOS and cannot for the love of me get RCS to work. Like it always briefly works until it turns itself off af. Maybe there is a problem with my MVNO not paying Google for Jibe? (Yeah this is probably the case as it says that RCS is managed by my carrier after giving Messages a certain permission to verify my hardware and operating system strings). That’s kinda shitty but whatever.