What's the most data a teenager could possibly use in a month, 15gb or 80gb?

[SlinkyDogg]

Our Virgin broadband is out of order for days, they just fob me off or hang up when I call!
I want to increase my daughter's monthly allowance on Giffgaff to
£15 - 15gb
£20 - 80gb
£25 - unlimited data
I'm thinking of going for the £20 option, surely she couldn't use more than that assuming my Virgin broadband doesn't return which is possible given the current situation.

Yes £20. £15 would be fairly useless, especially at the moment.

It depends on how much streaming she does, my kids watch Netflix etc on their phones all the time which would use loads of data.

We have unlimited on our teens phone.

I'd go for that tbh