Question: what are the best data plans?
Answer: Best mobile phone plan overall: Optus $49 Choice Plan.
Best SIM-Only plan: Circles.Life 20GB.
Best high-data plan: Circles.Life 100GB Plan (Discounted)
Next best: Mate #bestmates 30GB.
Best iPhone Plan: iPhone 11 Pro on Optus $49 Choice.
Next best: Vodafone $50 Red Plus Plan.