We recently updated the SMS/Text back end processing to utilize a true SMS/Text system. The prior system used an email to SMS/Text function that carriers provided, earlier this year ATT and Verizon ended support for this, so we transitioned to the new process.
That said, the old system did not support Bell and Rogers. I am under the impression that the new system does, let me talk with engineering to see if we are actually still utilizing “carriers” information and if so, what needs to be selected. I believe the carrier is not needed, so selecting anything might work.
I will update when I have more information.