If this is true: It doesn't add another protocol, it ultimately replaces two of them. How does this work (assuming your carrier supports MMS, and not all do

If this is true: It doesn't add another protocol, it ultimately replaces two of them. How does this work (assuming your carrier supports MMS, and not all do): Everyone on RCS can fall back to MMS just fine As for this: Even though Google Fi is definitely compatible with RCS https://old.reddit.com/r/GoogleFi/comments/l1czwh/google_fi_messages_for_web_when_are_we_getting_rcs/ https://old.reddit.com/r/GoogleFi/comments/l1czwh/google_fi_... More recently it looks like Google added some half assed support for RCS and broke other stuff in the process: https://old.reddit.com/r/GoogleFi/comments/12b8k2p/reminder_that_rcs_limits_as_much_as_it_adds_on_fi/ https://old.reddit.com/r/GoogleFi/comments/12b8k2p/reminder_...