Which SIM Card for Australia?

I have traveled multiple times in Australia - including South Australia, Western Australia, the Northern Territory, Queensland, and of course the Outback around the Red Centre. During these travels, not only did I experience breathtaking landscapes, but I also gained plenty of insight regarding mobile reception and internet access while traveling in Australia.

Because whether it's while navigating through the wilderness, searching for the nearest gas station, or sharing my impressions with family and friends - a reliable internet connection was indispensable for me on the go. Roaming with a German contract is not an option due to cost and inflexibility.

Instead, I rely on local prepaid SIM cards - and I have tried many providers. My clear recommendation: Telstra. No other provider has kept me reliably online on remote routes - especially in the Outback and between small towns.

In this article, I will show you my assessment of which SIM card is truly useful for Australia, where to get it, which providers are worth considering, and what you should keep in mind when using it. I will also introduce you to practical eSIM alternatives like Holafly and Airalo - perfect if you want to be online right after landing.

Australia is vast - and you realize this when you are driving for hours through deserted landscapes and suddenly have no reception.

Using a German contract abroad can be expensive. Even special international options usually offer insufficient data volume and are unsuitable for longer trips. With an Australian prepaid SIM, you are significantly cheaper - and you have full control over your usage. But I don't really need to tell anyone this, right?

Many international SIM providers only use the Vodafone or Optus networks. These work well in urban areas, but coverage drops significantly in rural or Outback regions. Local providers like Telstra cover remote areas too - ideal if you're going on a road trip.

This is often more practical than you think: Many accommodations, tour providers, or car rentals require a local number for contact at booking. SMS confirmations or callbacks work smoothly without relying on WhatsApp or foreign area codes.

From my experience, every tour provider or campsite wants a local phone number for confirmations or updates if a tour is rescheduled. If you have a problem (like we did in Queensland with the camper), you need to call local phone numbers.

On that trip, I only had an eSIM from Holafly. The reception was great (it uses the Telstra and Optus networks), but I didn't have a number. I had to call the camper rental with my German contract, resulting in an expensive phone bill...

Whether you are spontaneously booking accommodations, navigating with Google Maps, or making WhatsApp calls - with an Australian SIM card, you are connected everywhere. Without being reliant on Wi-Fi or stress.

My conclusion:

If you are visiting more than one city in Australia or are traveling with a camper or rental car, in my experience, there's no way around a local SIM card from Telstra.

Australia has three major mobile network operators: Telstra, Optus, and Vodafone. There are also several discount providers that access the networks of these three - often at significantly lower prices. Here, I will introduce you to the most important providers and explain what to watch out for.

Generally, you must always expect to have no reception in Australia. There are many remote areas without population, particularly along the west coast. Even in national parks, you should expect 'offline time'. I was surprised, however, that I often still had mobile reception at the Great Barrier Reef. Not always, but sometimes.

If you, like me, spend a lot of time on road trips or traveling to remote areas like the Outback, Northern Territory, or Western Australia, there's no alternative to Telstra. Telstra offers by far the best network coverage in the country - even along remote highways or in national parks, I usually had reception.

After many trips through Australia, Telstra has been my most reliable provider.

The starter pack costs $2, plus the plan you select. Further down in the text, you'll find the link to the plans and network coverage in Australia.

Boost Mobile is a reseller that uses the full Telstra network - a huge advantage over many other discount providers, which only have limited access. If you want to save a few dollars but still rely on good coverage, Boost is a very good alternative to Telstra directly.

Aldi Mobile also uses the Telstra network, but not fully. This means: In cities and larger towns, Aldi Mobile works very well - in rural areas, however, there may be dead zones. For shorter trips where you're mainly in urban areas, Aldi Mobile is still a solid choice.

Optus offers attractive prepaid plans with a lot of data volume. In major cities like Sydney, Melbourne, or Brisbane, the network works reliably. However, once you venture into rural areas or go on a road trip, coverage noticeably drops. Therefore, I consider Optus an option only if you stay exclusively in cities.

Vodafone Australia has the weakest coverage of the three major providers - especially outside urban areas. In cities, Vodafone usually works fine, but when traveling through rural areas or along coastal routes, the reception can drop quickly. For longer trips through the country, Vodafone is therefore not recommended.

I have tested various providers on my travels in Australia - during long road trips through the Outback, on coastal tours in Queensland, and in major cities like Adelaide or Perth. My companion had Optus while I had a Telstra SIM card. My experiences were quite different - especially concerning network coverage. Here's my personal comparison:

If you are traveling by car or camper and spend a lot of time outside the cities, I unreservedly recommend Telstra. I had reception with Telstra even in the middle of nowhere - between Alice Springs and Uluru or along remote highways. Other providers like Optus or Vodafone often had no coverage in these regions.

My tip: Get the SIM card directly at the airport or in a Telstra store so that you are available right from the start.

Boost uses the complete Telstra network - so you get the same reach as with Telstra, but at lower prices. For me, Boost is the best alternative if you want to save money while still maintaining reliability. You can buy Boost SIMs in many supermarkets and online stores.

If you mainly stay in cities like Sydney, Melbourne, Brisbane, or Adelaide, you can also opt for Optus or Aldi Mobile. Their networks usually work stably, and you often get more data volume for your money.

But be careful: as soon as you leave city limits, coverage - especially with Optus - drops significantly. Aldi Mobile uses the Telstra network, but only in a limited way.

Vodafone is rather unsuitable for tourists in Australia. Coverage outside of large cities is very patchy. A friend had almost no reception in South Australia - despite alleged network availability according to the map. In my view, Vodafone is not an option for traveling the country.

You don't have to look far to find a suitable SIM card in Australia. I often bought my SIM cards directly at the airport, but also in supermarkets and electronics stores. Here, I will show you the best options:

At larger airports like Sydney, Melbourne, Brisbane, or Perth, you will find shops or vending machines from providers like Telstra, Optus, and Vodafone right in the arrivals hall. Prices are not higher (as is sometimes claimed), and you will be online immediately after landing - especially handy if you want to get going right away, need to call an UBER, or need Google Maps for navigation.

Supermarkets like Woolworths, Coles, or Aldi typically sell SIM cards at the checkout or in the checkout area. Aldi sells Aldi Mobile, but other providers like Boost Mobile or Amaysim are often available - especially at Woolworths. This is a good option if you want to settle in first and deal with getting a SIM later.

Stores like JB Hi-Fi, The Good Guys, or the official Telstra and Optus stores often have the largest selection of plans and SIM cards. Here, you can also get help with activation on request and see which plans are available. I once bought my Telstra SIM in an official store - it was fast, straightforward, and ready to use right away.

My tip: If you want to ensure you have mobile internet as soon as you arrive, get the SIM card at the airport. If you want to compare in peace first, you can also pick one up in town. Contrary to many rumors on the internet, prices at the airport are not higher, nor are they cheaper in the city. The packages cost exactly the same.

That's at least my experience.

If you do not want to swap SIM cards or want to be online immediately after landing, an eSIM is a practical solution. I have tried several providers by now and will show you here what to consider - and when an eSIM is truly useful. The downside to these eSIM providers via app: you only have data plans, no local phone number.

An eSIM ('embedded SIM') is a digital SIM card that you activate directly on your smartphone - no plastic, no swapping. However, this only works if your phone is eSIM-compatible (e.g., from iPhone XS, Google Pixel from generation 3 or many Samsung models).

There are several providers offering eSIMs for Australia today. The best-known are:

I tested Holafly on a road trip from Cairns to Brisbane, as there were no SIM card shops at the airport, and we were heading directly to Port Douglas (in the evening). The unlimited data plan and reception with Telstra were excellent everywhere. It worked perfectly for WhatsApp, Google Maps, social media, research, and emails.

However, for longer travels or road trips through the Outback, I would always rely on a physical SIM card from Telstra or Boost Mobile again. The network coverage was simply much better. And you get an Australian phone number.

As mentioned above, we had issues with the camper and had to call their service in Australia. That was an expensive endeavor without a local SIM. While it is standard in some countries to be able to call via WhatsApp, Australia is still a bit behind.

Traveling in pairs? Then one person should buy a local prepaid SIM card from Telstra and the other should use data only via Holafly. This way, you have daily unlimited data available and can even create a hotspot. So both of you can enjoy the benefits: an Australian SIM card with a phone number and unlimited data on the other. Because data is still expensive down under (but at least cheaper than during my first visit).

Telstra Prepaid

Check the website in advance (here) to see which plan is right for you. Personally, I would always choose the highest one (currently with 125 GB). Although the offer is fantastic and unbeatable:

Boost Mobile Prepaid SIM:

Check the website in advance (here) to see which plan is right for you. I have found (in my experience) fewer Boost shops, but you can get the prepaid SIM cards in Woolworths markets. I don't know why, but I always used Telstra.

Aldi Mobile Prepaid Plan:

I personally haven't tested Aldi Mobile's prepaid SIM cards in Australia yet, so I can't tell you if it's truly worth it.

View all plans on the Aldi Mobile website

There are eSIM providers like sand on the beach. Though I have always been skeptical about Holafly (too expensive), in Australia it suddenly made sense. Unlimited data, no Telstra shop upon arrival at Cairns Airport (also, no other providers are available here), and thus the decision was made. For only $48.50 for 16 days on-site, Holafly was perfect.

Holafly Australia eSIM:

Airalo Australia eSIM:

I find the packages from Airalo really good in many countries. However, for Australia, they're sadly too expensive. I would always get a physical SIM card for Australia instead of this expensive data package. The network is from Optus, so it's also not ideal.

Conclusion: For longer trips or road trips across Australia, local SIM cards from Telstra or Boost Mobile offer the best value for money, particularly in terms of network coverage and data volume. eSIMs from providers like Holafly or Airalo are practical for short stays or if you want to be online immediately upon landing, but they usually lack an Australian phone number and have higher costs per GB.

With the right SIM card or eSIM, you are well connected in Australia - but there are a few things that can make your life easier on the road and help save data volume or avoid reception gaps. Here are my proven tips from experience:

Before you set off, download maps of the regions you want to travel to via Google Maps or an app like Maps.me. This is particularly helpful in the Outback or remote national parks, where reception can be weak even with Telstra at times.

Here I have a guide on how to save Google Maps offline, as I prefer that app.

In many cafés, restaurants, hotels, and even at campsites, there is free Wi-Fi. I always take this opportunity to upload photos to the cloud or do larger app updates - that way, I save data while traveling. However, these connections are often very slow. Patience is needed...

While traveling, it's worth keeping an eye on mobile data - particularly with smaller data plans. For example, I activate data saving mode on my iPhone, disable automatic app updates, and only use streaming services like Spotify or Netflix on Wi-Fi (make sure to save offline beforehand!).

Telstra offers very good network coverage, but there are also areas - especially in the deep Outback - without any reception. I check the official Telstra coverage map before longer trips to know where I might not have reception.

If you work with a laptop or tablet, you can often use your phone as a Wi-Fi hotspot. Important: Many eSIM providers don't allow this feature - local SIMs (e.g., Telstra, Boost Mobile) usually allow it without issue. I was able to create a hotspot with Holafly and use it on my laptop. There are various statements circulating on the internet. My experience: It works.

After several trips through Australia - from tropical Queensland to the remote Red Centre - I have tried a lot and learned what is essential for mobile internet. My clear recommendation: Go for a local SIM card - preferably from Telstra or Boost Mobile.

With Telstra, I had the best network coverage on all my road trips, even in remote areas like the Kakadu National Park, between Alice Springs and Uluru, or along lonely highways in Western Australia. If you're traveling longer distances or want to stay flexible, there's hardly a way around Telstra.

Boost Mobile is the ideal alternative for me if you want to save money while still relying on a trustworthy network - because Boost uses the complete Telstra network.

eSIMs like those from Holafly or Airalo are practical if you are staying only briefly or want to be online right after landing. However, they do not provide an Australian phone number, are more expensive per GB and often operate on the Optus or Vodafone networks - with limitations in coverage.

My tip: Get your SIM card directly at the airport or on your first day in a supermarket or retail shop. This way, you will be ready to start right away - whether in the city or on remote roads. If there's no shop at the airport and you want to be online right away? Then get unlimited data from Holafly for 1-2 days.

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