Late last year I got a sim card for my iPad with Vodafone on this great deal: https://www.ozbargain.com.au/node/282254
It was either 16GB or 24GB (I think paying online or via credit card netted an extra 8gb!) and it lasted for 6 months.
That'll be up for renewal soon, so I'm looking for another long life 3/6/12 month sim card, with some data, that's good value.
The network doesn't matter, aiming for under $100 total for the year (so $50/6 months) if it has 10GB data or so, I'll be happy.
Anyone have any suggestions or ideas?
This deal seems to meet your requirements