Using data add-on to add data to talk only plan?

Hi,
I have a discounted old plan with FIzz, with only talking minutes, no data.
I want to add mobile data, to use Internet on my phone, so I figured that I would add a data add-on. Would that work?
Would that also allow me to take advantage of my various data perks?
I'd rather not change my old plan in order not to lose my discount, hence the question.
Thank you.

Answers

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