Get 20GB for $26.25 per month on Optus and bonus Flybuys points

Earlier this year, Optus teamed up with Flybuys to offer an exclusive range of SIM-only plans. Now, it's cutting 25% off the entire range. These plans are still delivered by Optus, you'll just need a Flybuys account to nab them. They're as follows: 

• $26.25 per month gets you 20GB and 1,000 bonus Flybuys points, down from $35 per month
• $33.75 per month gets you 40GB and 5,000 bonus Flybuys points, down from $45 per month
• $48.75 per month gets you 80GB and 10,000 bonus Flybuys points, dwon from $65 per month

The plans come with unlimited talk and text and Optus Sport, but no international inclusions. They're available until January 31, next year. 

The 25% discount lasts for your first 24 months, after which you'll you'll pay full price. Of course there were will definitely be a better value plan around in two years time, so you can always bounce as soon as your discount runs out. Or before. You do you. 

The $26.25 per month plan is the clear standout. For comparison, spending $39 per month on Optus only gets you a 10GB allowance. This plan doesn't include Optus Sport, while the Flybuys plans do. 

There are a few other catches to be aware of. The Optus Flybuys plans require you to commit to a 12-month contract, whereas Optus' SIM-only plans are contract-free. You have to be a Flybuys member to get these plans, but registering for the program is free

You can check out Optus' Flybuys plans here.

If you want to increase the amount of Flybuys you earn, you can commit to a 24-month term. We wouldn't recommend this, however. 

For reference, here's a look at what other SIM-only plans between the $20 and $30 mark look like. 

Mobile Phone Plans

#1	Dodo	Dodo Large Mobile Plan 80GB data at download speeds up to 150Mbps Optus 5G in selected areas (exc NT) with a 5G device Deal: 50% off! Get the Large Mobile Plan for $20/mth for first 6 mths, then $40/mth. New and returning mobile customers only. Ends 08.12 $20.00/mth Min. cost $20 Go to Site	$20.00/mth Min. cost $20	Go to Site
#2	Moose Mobile	Moose Mobile Moose 100GB SIM Only 100GB data at download speeds up to 150Mbps Vodafone 5G Network in selected areas with 5G devices Deal: Get 100GB for $22– Includes $18 off for first 6 months, then reverts to $40. Offer ends 30.06.27 $22.00/mth Min. cost $22 Go to Site	$22.00/mth Min. cost $22	Go to Site
#3	SpinTel	SpinTel $29 Mobile Plan 50GB data at download speeds up to 150Mbps Optus 5G in selected areas with 5G devices ex. NT $29.00/mth Min. cost $29 Go to Site	$29.00/mth Min. cost $29	Go to Site
#4	Tangerine Telecom	Tangerine Telecom 15GB 5G Mobile SIM 15GB data at download speeds up to 150Mbps Uses parts of Telstra’s 5G and 4G mobile networks Deal: Bundle your mobile and nbn plans on the same account to get 10% off your mobile SIM-only plan fees. T&Cs apply. $30.00/mth Min. cost $30 Go to Site	$30.00/mth Min. cost $30	Go to Site

Sorted by price

See More Plans ~ Last Updated 7/11/2026

Powered By

How WhistleOut Works

Moose is a clear standout, offering 20GB for $22 per month on a 12-month term. Moose is powered by the Optus network.  

Alex Choros

Managing Editor + Group Telco Editor | X | Instagram | Threads | LinkedIn

Alex Choros is the Managing Editor of WhistleOut Australia and an award-winning journalist. He's been writing about consumer technology for over a decade and is an expert on the Australian telco sector, to the point where he knows far too many phone and internet plans by heart. In addition to leading the WhistleOut editorial team, Alex is responsible for ruining the office Sonos with his troubled taste in music.

Read full bio