Highway-1, ON>MB no service.

[PMuser]

Two days ago I crossed ON to MB , after MB border until Winnipeg was not service .
Also between Kapuskasing and Nipigon no service.
My previous providers Fido, Wind, Bell as well didn't have service in North of Ontario.

But in mountains of BC , Public Mobile have the best service relatively to other providers.

[NDesai]

There must be a reason why all providers you listed don't have service in those areas.