Last Days: 80GB Optus SIM-only plan for $41.25 per month

Christmas might be over, but the deals aren't. Optus has extended its festive flash sale until January 13, which means you've got one more week to bag a bargain.

There are two SIM-only plans on offer. You can get a 50GB plan for $40.50 per month, or an 80GB plan for $41.25.

Yep, you read that right. You can add an extra 30GB to your plan for just 75 cents more. We're not quite sure what's going on here, but we certainly aren't complaining.

Mobile Phone Plans

#1	Optus	Optus $60 Optus Choice Plus Plan 100GB data Optus 5G in selected areas (exc NT) with a 5G device Deal: $39/mth and 100GB/mth for first 12 months, then 60GB/mth and $60/mth or as notified. New services. Ends 12.11.26. Terms apply. $39.00/mth Min. cost $39 Go to Site	$39.00/mth Min. cost $39	Go to Site
#2	Optus	Optus Optus Prepaid $40 SIM (AutoRecharge only) 100GB data Optus 5G in selected areas (exc NT) with a 5G device Deal: Win More with Optus Prepaid. Unlock prizes when you activate or recharge $40 or more. Terms apply. $40.00 Per 28 Day Renewal Go to Site	$40.00 Per 28 Day Renewal	Go to Site

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See More Plans ~ Last Updated 7/11/2026

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These Optus plans are both sold on a 12-month contract and include data-free video streaming for no additional cost. Optus normally charges an extra $5 per month if you want unmetered access to Netflix, Stan, and ABC iview. Not that you need it when you have 80GB per month.

Here's how these plans compare to the rest of the market:

Mobile Phone Plans

#1	Lyca Mobile Editor's Pick	Lyca Mobile Editor's Pick Unlimited Plan S 50GB data at download speeds up to 100Mbps Vodafone 5G Network in selected areas with 5G devices Deal: $15 for first 6 renewals when you activate this plan. Offer ends 31.12.26. T&Cs apply $15.00 Per 28 Day Renewal Link not supplied	$15.00 Per 28 Day Renewal	Link not supplied
#2	iiNet	iiNet 50GB Medium Plan 50GB data at download speeds up to 150Mbps Vodafone 5G Network in selected areas with 5G devices Deal: 50% off - $17.50/mth for first 6 months, then $35/mth ongoing. Available until withdrawn. T&Cs apply. $17.50 Per 1 Month Renewal Link not supplied	$17.50 Per 1 Month Renewal	Link not supplied
#3	TPG	TPG 50GB Medium Plan 50GB data at download speeds up to 150Mbps Vodafone 5G Network in selected areas with 5G devices Deal: 50% off - $17.50/mth for first 6 months, then $35/mth ongoing. Available until withdrawn. T&Cs apply. $17.50 Per 1 Month Renewal Link not supplied	$17.50 Per 1 Month Renewal	Link not supplied
#4	Lyca Mobile	Lyca Mobile Unlimited Plan M 120GB data at download speeds up to 100Mbps Vodafone 5G Network in selected areas with 5G devices Deal: $20 for first 6 renewals + includes 40GB bonus data on activation and first 11 renewals. Offer ends 31.12.26 $20.00 Per 28 Day Renewal Link not supplied	$20.00 Per 28 Day Renewal	Link not supplied
#5	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
#6	iiNet	iiNet 100GB Large Plan 100GB data at download speeds up to 250Mbps Vodafone 5G Network in selected areas with 5G devices Deal: 50% off - $22.50/mth for first 6 months, then $45/mth ongoing. Available until withdrawn. T&Cs apply. $22.50 Per 1 Month Renewal Link not supplied	$22.50 Per 1 Month Renewal	Link not supplied

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See More Plans ~ Last Updated 7/11/2026

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These offers are available to January 13 (this Sunday), unless extended again.

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.

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