Pennytel are doing 3 months half price. They do proper monthly recharge rather than 28 days. Telstra MVNO and has roaming which is useful. Free SIM delivery and no cancellation/port out fees. No data rollover and costs $10 for 1GB.
Critical information summary: https://pennytel.com.au/sites/mnfpennytel/media/1686.pdf
So every 3 months you buy another one? is that $5.50 per month or for 3 months?
Also how do they do data do they stop you when you reach your limit and you have to top up some more or do they just let you go over and charge you later.
Kogan I know and a few others don't let you download more than your plan and ask you to top up preventing bill shock and surprise data costs.