Heading overseas and don’t want to count gigabytes? An unlimited data eSIM gives you data for the whole trip without topping up. For most Australians, Airalo is the best all-rounder, Saily gives you the most full-speed data each day, and Holafly is the simplest if you’d rather never think about data at all. Here’s how they compare, and the catch every “unlimited” plan has.
Unlimited eSIM Deals for Australians
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What “Unlimited” Really Means on a Travel eSIM
Almost every unlimited eSIM comes with a fair usage policy. You never run out of data, but after a set amount of full-speed data each day, your speed is slowed until the allowance resets, usually every 24 hours. Messaging, maps and email still work fine at the slower speed. Streaming, video calls and big downloads don’t.
The second thing to check is hotspotting. Some providers let you share your unlimited data with a laptop or a travel partner’s phone freely, while others cap how much you can share each day. If you’re travelling as a family or working on the road, that difference matters more than the price.
The Best Unlimited Data eSIMs for Australians
Airalo: best all-rounder
Airalo’s unlimited plans give you 3GB of full-speed data every 24 hours, then 1Mbps until it resets. That covers maps, socials and the odd video for most travellers. The standout is hotspotting: Airalo doesn’t put a separate limit on it, so you can share your connection with other devices. Unlimited plans aren’t available in every country Airalo covers, so check your destination first.
Best for: families and couples sharing one connection, and most trips to Japan, Europe and the US. See our Airalo discount code.
Saily: most full-speed data per day
Saily’s unlimited plans are reported to give around 5GB of full-speed data a day before slowing to about 1Mbps, which is the most generous daily allowance here. They’re available in major destinations like Japan, Thailand, the US and across Europe, but not everywhere Saily sells capped plans. Saily also has a premium subscription, Saily Ultra, with unlimited global data and NordVPN tools included, which suits frequent travellers more than a single holiday.
Best for: heavy phone users who stream or video call on the go. See our Saily discount code.
Holafly: simplest unlimited option
Holafly only sells unlimited plans, so there’s nothing to work out. It doesn’t publish a fixed daily speed cap, but the local networks it uses can slow you down after heavy use. The catch is hotspotting, which is capped at around 500MB to 1GB a day depending on the destination. On your own phone, it’s about as close to set-and-forget as it gets.
Best for: solo travellers who want one plan and no data maths. See our Holafly discount code.
Simify: best for Asia-Pacific trips
Simify is Sydney-based, so its support hours overlap with home, and its coverage is strongest across the Asia-Pacific. Its unlimited plans give around 1.5GB of full-speed data a day before slowing to about 1Mbps, and you can hotspot on them. It also sells capped plans, so you can switch if unlimited is more than you need.
Best for: Bali, Fiji, New Zealand and other Asia-Pacific trips. See our Simify discount code.
Nomad: best for testing the network first
Nomad’s unlimited plans give 2GB of full-speed data a day, then 512kbps until it resets. That slower fallback is the weakest here, but Nomad’s free trial lets you check the network in your destination before you pay.
Best for: cautious buyers and Europe trips, where Nomad’s pricing is often sharp. See our Nomad eSIM discount code.
Unlimited eSIMs Compared
| Provider | Full-speed data per day | Speed after that | Hotspot |
|---|---|---|---|
| Airalo | 3GB | 1Mbps | Yes, no set limit |
| Saily | Around 5GB | Around 1Mbps | Check plan details |
| Holafly | Not published, set by the local network | Varies by network | Capped, around 500MB to 1GB a day |
| Simify | Around 1.5GB | Around 1Mbps | Yes |
| Nomad | 2GB | 512kbps | Check plan details |
Allowances are as published by each provider and can vary by destination. Check the plan details in the app before you buy.
Do You Actually Need Unlimited Data?
Maps, messaging and a bit of social media usually comes in under 1.5GB a day, so a capped plan is often cheaper on a short trip. Unlimited starts to make sense when:
- you’re away for more than a week and don’t want to top up
- you stream, video call or post a lot of video
- you’re sharing a hotspot with family or a laptop
- you’d simply rather not track your data
If none of those sound like you, compare capped plans in our best travel eSIM for Australians guide, or start with our eSIM guide for Australians if you’re new to eSIMs.
eSIM vs Your Aussie Carrier's Roaming
Telstra, Optus and Vodafone all sell international roaming as a daily charge. It's convenient, but for most trips a travel eSIM is the better deal.
- Daily fees add up. You pay for every day you use your phone, so a week or more away usually costs far more than one prepaid eSIM.
- One text can cost a day. Sending a text, answering a call or a background app update can trigger a full day's charge.
- Data can run short. Many roaming passes cap your daily data, while eSIMs offer larger and unlimited plans.
- No bill shock. An eSIM is paid upfront, so there's nothing extra waiting on your phone bill when you get home.
Best of both: keep your Aussie SIM on for incoming texts like bank codes, turn off its data roaming, and use your eSIM for data.
Find Your Destination Guide
We've built dedicated, independently-researched eSIM guides for 25 destinations. Each one covers real network coverage, pricing, and any destination-specific quirks worth knowing before you buy.
United Kingdom
France
Italy
Spain
Germany
Greece
Portugal
Japan
China
Thailand
Vietnam
Cambodia
Singapore
Malaysia
South Korea
Philippines
India
Sri Lanka
Indonesia (Bali)
USA
Canada
Mexico
Australia
New Zealand
Fiji
Don't see your destination listed, or heading somewhere with multiple stops? Check our full eSIM deals page, or the Europe regional guide if your trip spans several European countries on one itinerary.
Frequently Asked Questions
Are unlimited data eSIMs really unlimited?
You won’t run out of data, but almost all of them slow your speed after a set amount of full-speed data each day. The allowance resets daily, usually every 24 hours.
Can I use a hotspot on an unlimited eSIM?
It depends on the provider. Airalo and Simify let you hotspot on their unlimited plans, while Holafly caps hotspot sharing at around 500MB to 1GB a day depending on the destination.
What happens when I hit the daily limit?
Your connection stays on but slows down, typically to around 0.5 to 1Mbps. That’s fine for messages, maps and email, but too slow for streaming or video calls. Full speed returns when the allowance resets.
Is an unlimited eSIM cheaper than Telstra, Optus or Vodafone roaming?
On most trips longer than a few days, yes. Carrier roaming charges a daily fee for every day you use your phone, while an unlimited eSIM is one upfront price for the whole trip.
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Michael has been publishing deals and travel content for Australians for more than 10 years and runs the deals section of The Champagne Mile. With a Bachelor of Commerce and a background in commercial law, he reads the fine print so you don’t have to, from insurance PDSs to promo code terms. Every deal on the site is checked before it goes live and updated when offers change. When he’s not testing codes, he’s planning his next overseas trip or out on his dirt bike.
Last Updated on 13 November 2026
