Answered question
I will be living in the USA full time as of June. If i get the Canada USA plan will i be able to roam at no extra charge for a full year?
Other answers
No, you cannot.
Here a previous discussion, take a lot of all the possibilities.
https://community.fizz.ca/questions/1928876-snow-bird-coverage
Edited answer
If you want people to reach you through your Canadian phone number while you're in the US I suggest this work around.
Before entering the US do this:
1- Make sure you have a Canada+US plan
2- Buy your self a US provider SIM card
3- Set a call transfer for all your calls on your Fizz number to your new US phone number.
4- Swap the SIM card in your phone for the US SIM card.
Chizz :))
Agree with Chizz. Look into Roam mobility.
No maximum 3 months straight
Buy a USA SIM instead