Hello Pilep19,
I am currently living in Montréal, QC. I was not really sure about buying one or not… Because of carrier frequency compatibility : https://www.frequencycheck.com/carrier-compatibility/1d7afVB/fairphone-2-fp2-dual-sim-lte/fido-canada
But it seemed to be working (at least partially…?). Anyway, I bought a Fairphone 2, which I shipped to my home in France when I was in vacation. When I arrived in Montreal I turned on the phone and… Taaaadaaaam! 
Works perfeclty with my provider Fido at least in the Montreal area : 2G 3G 4G. I did not try somewhere else yet. I will update this post later !
Hope this will help.
PS : for french readers, I recommand this very nice blog post about the Fairphone 2 https://grisebouille.net/fairphone-un-telephone-pour-libriste/ This convinces me.