Welcome to the community!
For how long are you going to be in Cambridge Bay? Fido/Rogers do not have coverage in Cambridge Bay. There appears to only be a single provider available in the area.
~taken from here.
Since Bell operates many of the same bands/frequencies in the area, it's likely our phone would work there. If you only plan on visiting the area, you might be able to avail of extended coverage as Fido-EXT. However, extended coverage usage is only meant on a temporary basis. If the majority of your usage was on the Fido-EXT, access to extended coverage would likely get blocked.
If you're moving to the area, you'll likely have to switch providers.
Hope this helps 😀