Pre Paid Recommendations

Hello all,
All I need is a sim card with loads of data , now kogan is great ( under $5 23 gig) but I hate the port out port in / out drama every month.
My phone usage is very very min.I make just 2-3 calls a month which might be about 5 - 7 mins of air time.
Any recommendations to make it easy for me is appreciated.
I rearecanted someone mentioning to buy a good phone like a s9 on plan then sell the phone and pay the phone and just stick to the plan.not sure of the math and how that works and but what if the phone doesn't sell.I really don't need a high end phone for my so called usage.

Will look forward to your thoughts.