You can snag 350GB of data over 12 months for just $169 with OnePass Mobile — that's less than $15 a month for heaps of data. Even better, TopCashback AU is throwing in 20% cashback ($33.80), bringing your effective cost down to around $135.20. Just remember to activate your SIM within 30 days and stay connected for at least 75 days to lock in that cashback, and skip the retailer's mobile app when you buy.
