Cannot call from Hawaii to Canada ?

You have to contact Fizz https://fizz.ca/en/faq/resolving-issues

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Someone else had trouble to call Hawaii from Canada even with Canada & US .

Thank you. Trying to contact them through chat but not able and as they recommend through Facebook. Still waiting for an answer. Hopefully it will work soon.

I don't know if AK/HI is covered.

To have the chat try this link. Dont worry at wht's is wrote and ask your question.
https://fizz.ca/fr/faq/plaintes