Someone asked recently about C2 LTE bands and there is supposedly 0 overlap with US C2 Jolla Community Phone - 4G LTE bands/channels/frequencies - #9 by jovirkku
Maybe Canada is better, but probably xperias have a better chance (III is out and most likely to work, check with your provider, someone roaming in Canada said he had no problems, but that might require changing your mobile operator, IV/V are in constant state of about to be released since a year, so have patience, it will probably be rough for a couple releases after first too though, current state is not daily drivable and no android app support (and a bunch of big issues like no camera support and battery level stuck etc))
Edit: and even if you go for xperia 10III you will need to jump through extra hoops like using vpn to buy a license, but hopefully jolla can cash in on this current situation/fad, just like mozilla could with manifest v2 fiasco, time will tell