More data for your money, longer expiry, and more room for data rollovers: what's not to like?
If you're a regular and fairly heavy user of mobile data, you're probably on a plan. But if you mostly use your tablet at home, at the office or other places where there's good Wi-Fi and you don't like the additional fuss of tethering to your mobile phone, you might find a prepaid SIM more convenient.
Prepaid can also be handy if you've bought a Wi-Fi modem or a router with 3G or 4G capability as a backup in case your fixed-line connection goes down - there's no point paying every month for data that you don't use or need.
The new My Prepaid Mobile Broadband from Optus allows 1 ($10), 4 ($30), 7 ($50) and 22GB ($130) recharges, with seven, 30, 365 and 730 day expiries respectively.
And by recharging before the credit expires you can roll over up to 50GB of unused data.
For comparison, Telstra's prepaid recharges range from 1GB for $10 with three day expiry to 16GB for $140 with 730 day expiry. Not quite as generous as Optus, but there doesn't seem to be a limit on rollovers. Over at Vodafone, there's a wider selection of recharges starting at 500MB and 30 days for $10 through to 22GB and 365 days for a relatively hefty $200.