Straight from the Fido website:
What’s the offer?
Between October 7–24, 2016, new and existing eligible postpaid customers qualify for 1GB of free bonus data (500MB a month for 2 months). Your bonus data will go into effect when your November billing cycle begins. We will text you when it starts.
If you have multiple lines on your account, take full advantage of the offer by opting-in all your lines. Each line is eligible for an additional 500MB of free bonus data a month for 2 months.
Note: If you exceed the data included in your plan and under this offer, regular overage charges will apply.
More details found here :https://www.fido.ca/consumer/content/anniversary-data