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Earlier offer
Boost Mobile: $7 Cashback on 80GB 28-Day Prepaid SIM for $12 (Was $39) @ TopCashback AU
Posted 6/1/2026

Boost Mobile: $7 Cashback on 80GB 28-Day Prepaid SIM for $12 (Was $39) @ TopCashback AU

MobileBoost MobileBoost Mobile $39 Pre-Paid SIM Starter Kit

Score a massive data upgrade for next to nothing with this incredible Boost Mobile offer! You’re getting a whopping 80GB of 5G data for just $5 effectively, once you factor in your $7 cashback.

  • Pay just $12 upfront (down from $39) for the 80GB prepaid SIM.
  • Snag an extra $7 cashback via TopCashback to bring your total cost down to a measly $5.
  • Includes 5G speeds and international calling to keep you connected for less.

Just a heads-up: make sure to purchase via a desktop browser with ad-blockers turned off, and activate your SIM within 30 days to ensure your cashback tracks correctly!

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