I see, thanks for clarifying. I've tried the Shizuku method but doesn't work, as with a few others on Telus. Not sure if it's because I'm on Android/Oxygen 14 whereas most who have had success were on previous versions. Can't register the IMS.
I'm in a similar situation also using an 8T. Can you clarify what do you mean you were told the same thing regarding the s23 Ultra? Even after switching to the S23U, you still don't have IMS registration?