As a Vermont resident who enjoys visiting Montreal and Canada often I've been struggling to find an ideal cell phone provider.
I finally decided to try Google Fi. Fi offered roaming data at the same price as domestic. There is excellent coverage and seamless transition when crossing the border.
Three years in and I'm still sold.
To get a discount use this link:
Here's a referral code to get a $20 credit when you join Google Fi! Redeem it at