Internet, SIM Cards and Phone Coverage

Australia has three mobile network operators: Telstra, Optus, and Vodafone. Telstra has by far the largest coverage area, particularly in remote and regional Australia. Optus comes second. Vodafone has reasonable coverage in major cities and along the east coast but very little outside that. For any trip into outback Australia, Telstra is the only realistic choice.

Visitor SIM cards are easy to buy on arrival. International airports, supermarkets and electronics stores all sell prepaid SIMs from all three operators. Plans typically run for 28 days and include 30 to 80 GB of data, unlimited Australian calls, and varying amounts of international call credit. Expect to pay between 30 and 50 dollars depending on the data inclusion. Identity verification is required by law: bring your passport when you buy.

ESIMs are widely supported. All three operators offer eSIM versions of their prepaid plans. International eSIM brands like Airalo also work in Australia, usually using the Telstra or Optus network depending on the plan.

Phone coverage in the cities and along major coastal routes is typically excellent, including 5G in most metropolitan areas. Coverage drops sharply on inland highways. Long stretches of the Stuart Highway (Adelaide to Darwin), Great Central Road, Eyre Highway (Perth to Adelaide), and most of the Kimberley have no signal at all. Plan accordingly: download offline maps before you leave a town, and consider carrying a satellite messaging device (such as a Garmin inReach) for emergencies on remote routes.

Wi-Fi is universal in cafes, hotels and public libraries in cities and major towns. Fuel station roadhouses on the major outback routes generally have wi-fi but often charge for use. Mobile data tethering from your phone is the most reliable option in towns.