Edit: I just see you are talking about Canada, while my post is about the USA. I’m sorry for the confusion.
Another edit: For Canada, take a look at the Wikipedia page of Rogers. I do not know whether it is up to date, but the information (2G until 2020) seems credible.
Original post about USA:
T-Mobile is reported to have a working 2G network in some topics on the FP2. The relevant frequency band, 1900MHz GSM, is also supported by the Fairphone 1.
See also T-Mobile US - Wikipedia, “Currently retaining 2G service for M2M customers and international roaming.” Apparently T-Mobile sees a market for roaming, being the only one who still have a network that is almost universally supported by foreign telephones. (AT&T also caters this market, but it supports only the FP2, not the FP1…)
Verizon’s is also still online but it is incompatible as it is a CDMA network, not a GSM network.