Hi Suze,
That plan is with Pennytel but I have a separate sim card in my tablet.
The sim in my tablet is with Amaysim and costs me $10PM and, just recently, they upgraded me from 2GB pm to 4Gb pm and they also now let you roll over any unused data. Currently I have 8GB from the last 2 months and 4GB not used this month so I have 12 GB sitting there. Unless I watch sports or play online games, there’s no way I’m going to use all that data.
This is an even better bargain that the first one.
I’ve just had a look and it appears that I’ve got the 4GB pm because I’ve been with them quite a while. Newcomers seem to get 2GB pm but that is still carried over to the next month if you don’t use it. https://www.amaysim.com.au/plans/mobile-plans/