With an eSIM you'll get data to connect to the internet, so you can use your smartphone throughout Australia. Most smartphones nowadays are compatible with eSIMs, but make sure to check just in case.
Get your eSIM data bundle for Australia (discount included) and you'll have mobile data from the moment you land. These eSIMs are from famous security company Nord, making your life on the road easier and more secure. In Australia you'll connect to the Vodafone Hutchison's network, which has excellent coverage.
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If you prefer an oldskool SIM that also includes mobile minutes, we recommend going to a shop when you arrive in Australia and get a SIM from Optus or Telstra.