The best eSIM for Australia depends on how much data you need, but for a typical trip eSIM Ahora offers plans from $1.20, activated by QR code in about 30 seconds with no roaming from your home carrier. A 3 GB, 30-day plan costs $3.11. You connect, with top-ups available and nationwide coverage. Compatible with iPhone XS or newer, Samsung Galaxy S21+ and Google Pixel 3+.
Full-speed data every day; after the daily cap the speed is reduced.
Full speed up to 500 MB/day, then 512 Kbps.
Every eSIM can be installed within 180 days of purchase. Plan validity starts when you first connect.
Your eSIM picks between these networks on its own. If you see bars and nothing loads, you can pick one by hand.
Your Australia eSIM runs on one network: Optus. Other local networks won't carry your data: if you see signal bars and nothing loads, turn off automatic network selection (iPhone: Settings → Cellular → your eSIM → Network Selection; Android: Settings → Network & internet → SIMs → your eSIM) and pick Optus by hand.
Australia has three main carriers: Telstra (the dominant network, largest nationwide coverage especially in rural areas and the Outback), Optus (second largest, broad 5G in Sydney, Melbourne, Brisbane, Perth), and Vodafone Australia (best urban value, more limited outside cities). Plugs are Type I (Australian, unique — three flat pins in an inverted V), 230V — you need a specific adapter from the US, Europe, or Asia.
Sydney (SYD), Melbourne (MEL), Brisbane (BNE), and Perth (PER) airports offer unlimited free WiFi. The currency is the Australian dollar (AUD); use Commonwealth Bank, Westpac, ANZ, or NAB ATMs — no commission on Visa/Mastercard up to 1000 AUD. Tipping isn't required — Australia has a high minimum wage. At the Great Barrier Reef and remote Outback zones (Uluru, Kakadu, Kimberley) coverage drops significantly — only Telstra has decent presence. Download offline maps for Stuart Highway or Great Ocean Road road trips.