Boost uses the Telstra 4G network.
For $20 you get unlimited calls & text, 15GB data, 100 international minutes to 50 countries, free Apple Music streaming, and unused data rollover. (if you choose auto recharge)
Note: $20 is for 28 days only after the first month you'll have to pay the full price $40. By choosing the auto-recharge option gives you the full month each time as recharge is set for the same day each month.
Thanks @tightarse for post layout.
Forever or first month only?