Mobile Plans With 50GB to 100GB Data

In our database, we're comparing 57 mobile plans offering between 50GB and 100GB of data a month, all with included talk & text, billed every 28 or 30 days, from 33 providers across the Telstra, Optus and TPG networks (TPG's network also covers Vodafone-branded plans). Advertised prices run from $11 to $95 a month, averaging $34.66, while regular/ongoing prices average $42.78 once you account for plans that revert to a higher price after an intro period. 34 of the 57 plans are genuinely priced with no promo hike, while the other 23 start cheaper as a limited-time offer and step up afterwards. We've split the tables below so you can tell the difference at a glance, and flagged the 14 plans that bill every 28 days with a monthly-equivalent figure so they compare fairly against the 30-day majority.

Genuinely priced, no promo hike (34 plans)

Sorted by cost per GB (regular price), lowest first. These plans cost the same now as they will on renewal -- what you see is what you keep paying. Most bill every 30 days; where a plan bills every 28 days instead, we've added its monthly-equivalent price underneath.

Starts cheaper, price increases later (23 plans)

Sorted by current advertised price, lowest first. "Now" is the price you'll pay today; "Then" is the regular price it reverts to once the promo period ends. Cost per GB is calculated on the regular (post-promo) price, since that's what you'll actually be paying long-term.

Compare by network

Best value by data amount

Best cost-per-GB (genuine, no-promo price) within each data band.

A note on billing cycles

43 of the 57 plans on this page bill every 30 days, and 14 bill every 28 days -- there were no plans matching our filter that billed monthly-calendar (e.g. "1st of the month") rather than on a fixed cycle. A 28-day cycle works out to about 7% more billing periods a year than a 30-day cycle, so a plan that looks cheaper by sticker price can actually cost more per month once normalised. For example, Lebara Mobile's $30 SIM Plan is $11.00 every 28 days -- that's ≈$11.79/month equivalent, not a flat $11.00/month, and its regular price of $30.00/28 days works out to ≈$32.14/month once the promo ends. We've added the monthly-equivalent figure under the price for every 28-day plan in the tables above so you can compare it fairly against the 30-day majority.

Frequently asked questions

Prices and data allowances shown are current in our database as of August 2026 and reflect advertised carrier pricing at time of listing. Where a plan has an introductory promo, we show both the current and regular price so you can see the true long-term cost. Monthly-equivalent figures for 28-day plans are calculated as price × (30 ÷ 28) and are provided for comparison purposes only -- they do not represent an actual monthly billing amount. CTA links go to each carrier's general provider page rather than a specific plan, since the underlying export doesn't include per-plan URLs. Plans, prices and inclusions change frequently, and details are entered into our database manually so errors are possible -- we do not guarantee the accuracy of any price, allowance, or other detail shown. Always confirm the final price and all plan information directly with the carrier before signing up.