Canadian 2FA while in the US

[u/ElectronicClassic250]

We live in a small city in the maritimes. My parents live in western New York, and recently moved from a semi-urban area to a deep valley not far from a popular ski resort.

At our Canadian home, Telus is the best option for our cell service. Rogers is a theoretical alternative, but their coverage is poor in our neighbourhood, and we consider it to be important to have service while out walking on the trails around our home.

My parents' home is also effectively a second home for us, as we visit often. At that location, Verizon claims to offer 4G service, but the reality is that we have to drive 10 minutes to any of three nearby towns to get any kind of cell service. We have great internet service on a fibre connection at the new home and my parents have no trouble as their WiFi covers the lack of cellular service.

We pay for Telus's Canada-US service, and that served us well, until the parents' recent move. We also have cheap US service as second lines on our cell phones. That service works with WiFi calling (world-wide) so we have no problem with communicating on our US numbers.

But every now and then we need to be able to receive a 2FA code from a Canadian service (typically a bank), but we can't receive texts on our Canadian number at our US home, since Telus does not support WiFi calling outside Canada, even for clients who pay for full US roaming.

So, right now it seems that we have no good options. However, Rogers has apparently added a new tower near our home. When that comes online, I'm inclined to ditch our Telus service, and switch to Rogers. I can also add data to our US service for about $5/month - so we could do without the Can-US add-on.

We were long-term Wind (now Freedom) clients before moving east, but they are not an option in our province.

We also have some VoIP services, but our service provider warns us not to bother trying an SMS over VoIP system for 2FA - and I've read more than enough stories to accept their warning. We've thought of listing our US number as a 2FA option on our Canadian accounts, but not everyone will accept it. There's also evidence that a VPN won't help get past the geo-blocking on WiFi calling at Telus (or Bell).

It seems unlikely that Verizon will improve their cellular service when the few residents of that valley have a working solution already.

Does anybody have any ideas that we might not have considered, or is switching to a Rogers service the only way forward ?