When did you data stopped working? Have you made any changes to your account lately?
Your data access could be impacted by the following:
Does your Fido plan include data? It goes without saying that this is the minimum requirement to access that service. You can confirm your plan's detail on the Fido mobile app or on your Fido.ca profile after signing in.
If your plan includes data, but the status bar on your phone does not include the mention "LTE", you might want to go over your phone's settings.
iPhones will generally automatically download the necessary configurations when connected to our network. For Androids though, you might want to have a quick look at your APN settings.
Signal strength. Are you currently located somewhere where you're getting less than 3 bars of signal strength?
Has your account been suspended? Service suspension will generally cut off all your services and not only data. You can verify this simply by reaching out to us at these channels