Note to those in Canada: although calling a toll-free number is... toll-free... sending an SMS to one may incur you an international (USA) SMS fee per message unfortunately :/

This turned out a big thorn in my side when I, as a Canadian, wanted to make my existing toll-free number hosted with Flowroute then Twilio my primary contact number.

Maybe there's some magic to make the number 'Canadian' such as hosting it with a Canadian provider, but just a heads up that not all toll-free are that when it comes to SMS (even though in this instance you're only likely to try it a couple times) :)