Go the linked website and search for "
Data Amount & Type | 40GB, Priority Data |
under
PRIORITY SERVICE PLANS
I don't know how to attach photos here.
So as far as I can tell this is not something you need to buy, but that is, again as far as I can tell, what was referred to.
Also, the question is not consuming too much data, you have indeed unlimited data at your disposal, the question is HOW you consume it. If they detect a peak in consumption that is continuous, they can limit your speed, not the amount of data...