Answered question
What happens when once I use all my data? Is my data cut off or will I be charged overages?
If you have any balance in your account, it will be deducted from that (per mb). View the article below for more info.
https://fizz.ca/en/faq/im-at-risk-of-depleting-my-monthly...
Other answers
Once you use all your data, Fizz will text you and cut off your data so you don’t go over. Then you will have the option to add more or go WiFi hunting!
You get on the forums and ask kind strangers to donate data to your account.