I was using the 1hr 'unlimited' data to download apps when I reach 45g fido popped up this message and shut my session.
I do believe fido said it is unlimited and I can use it to do whatever I want right? Isn't that a lie?
Welcome to the community!
While it is unlimited we are still bound by Fido Terms of Service and Acceptable Use Policy and using 45GB within an hour on a cellphone can be classified as unacceptable.
You can find the Terms of Service including the Acceptable usage policy here.