I'm sorry about the bad link, I don't know what happened I copied it straight from Reddit.Anyway, this should be the right one: https://www.reddit.com/r/GooglePixel/comments/9wn1i0/for_those_on_rogers_with_issues_setting_up_rcs_in/?utm_source=reddit-...
Someone on Reddit found a solution concerning RCS. You have to disable the app called Carrier Services, now setup RCS through the Messages app.Then you can reenable Carrier Services.https://www.reddit.com/r/GooglePixel/comments/9wpcrv/pixel_3_xl_on_a...
I have "registered, available, unavailable". I actually haven't tried before posting, but now that I did try wifi calling is enabled but doesn't work. VoLTE does though.