Australia eSIM
data from $2.99.

An Australia eSIM is a data only plan you install before you fly, so your phone is online the moment you land in Sydney or Melbourne. Slashtel plans start from $2.99 and run on Optus and Telstra, the two networks most travellers rely on. There is no local number and no calls or SMS, but WhatsApp, FaceTime and maps all work over the data connection.

Choosing an eSIM for Australia

What matters is coverage on the main networks, enough data for your trip, a validity window that fits, hotspot support and installing before you leave. Everything else is detail.

Start with coverage. Slashtel connects to Optus and Telstra, and your phone picks the network automatically, so you do not have to choose or configure anything. Between the two, you have a sensible spread of coverage across cities, suburbs and the routes between them.

Then think about data. A short city break in Sydney or Melbourne uses far less than a month with family or a road trip with maps running all day. Work through the trip types below and pick the size that matches, with a little room to spare.

Validity matters as much as size. Plans run for 7, 15 or 30 days, and the clock starts when the plan connects in Australia, not when you buy it. A long visit to family needs a 30 day plan even if the data amount is modest.

Check hotspot support if you plan to share data with a laptop or a second phone. The eSIM allows it, so a single plan can keep a car full of devices online.

Finally, install before the trip. If you are asking what is the best eSIM for Australia for your own travel style, the honest answer starts with a plan that fits your days and your data, installed and tested at home. Our guide to installing an eSIM on iPhone and Android walks through the steps, and you can confirm your handset with is my phone eSIM compatible.

Plans and prices for Australia

Plans come in 1GB, 3GB, 5GB, 10GB, 20GB and 50GB sizes, each with a 7, 15 or 30 day validity, and prices start from $2.99.

The table shows the sizes and the validity that suits each one. If your trip is shorter than the validity shown, a smaller plan with a shorter window can still work. The price you see at checkout is the live price for that size.

For a week in Sydney or Melbourne, the 1GB plan over 7 days is a light option for maps and messages. A two week trip with a hire car suits 3GB over 15 days. A month with family, or a long road trip, points to 5GB, 10GB, 20GB or 50GB over 30 days depending on how much you stream and share.

Networks and coverage in Australia

Slashtel connects to Optus and Telstra, and your phone selects the network automatically. You do not need to pick an operator, change settings or buy a second plan to switch.

Optus and Telstra both serve the big cities and the routes between them, which covers the way most visitors travel. In Sydney and Melbourne you will spend most of your time on strong city coverage. On a road trip, coverage follows the towns and highways, and there will be stretches of open country where any network is thin. Download offline maps before long drives so navigation keeps working when signal drops.

Because the network is chosen for you, there is nothing to configure on arrival. Turn the eSIM on and let the phone do the rest. If you land in Sydney and the data does not start immediately, toggling the line off and on again is usually enough.

How much data you need

Match the plan to the trip: a week in the city needs little, a month with family or a long drive needs more. These are the sizes we suggest as a starting point.

• One week: 1GB over 7 days, for maps, messages and light browsing.
• Two weeks: 3GB over 15 days, comfortable for a city stay with some navigation.
• One month: 3GB over 30 days, a modest amount for a long visit with family where you are mostly on Wi-Fi.
• Road trips and heavier use: 5GB, 10GB, 20GB or 50GB over 30 days, depending on streaming, hotspot use and photo backups.

Data use climbs quickly with video, cloud photo uploads and hotspot sharing. If you plan to stream or work from the road, move up a size. Topping up later is possible, but starting with enough data avoids the interruption.

Install it before you fly

Install the eSIM at home, on reliable Wi-Fi, before you leave for the airport. Installation needs an internet connection, and doing it early means any problem surfaces while you can still fix it.

The eSIM installs as a second line alongside your usual SIM. Keep your home SIM active for calls and bank codes, and use the Australia eSIM for data. When you land, switch mobile data to the eSIM line and turn on data roaming for that line if your phone requires it.

Label the new line clearly in your phone settings so you do not mix up the two. Our installation guide covers both iPhone and Android, and the compatibility check confirms whether your handset supports eSIM before you buy.

Calls, texts and your home number

The Australia eSIM is data only: no local number, no calls and no SMS. Your regular number stays on your home SIM, which is exactly what you want for bank codes and messages from family.

WhatsApp, FaceTime and other apps that call over data work normally once the eSIM is active. That covers most of what travellers need: calls home, messages, voice notes and video. If someone needs to reach you on your usual number, they still can, because your home SIM remains in the phone.

Keep an eye on charges from your home operator. Leave that line set for calls and texts only, with data switched to the eSIM, so you are not paying roaming rates for data by accident.

Questions travellers ask about Australia

Short answers to the things people check before buying an Australia eSIM.

Most travellers want to know whether it is data only, whether WhatsApp works, whether hotspot is allowed, when the plan starts, how topping up works and which phones are supported. The answers below cover each in turn.

If your question is about your specific handset, run the compatibility check first. If it is about timing, remember the validity begins when the plan connects in Australia, so buying early does not cost you days.