Our Authors

Sophie Callahan

Sophie Callahan is a travel writer at HelloRoam who covers travel tech and data plans for visitors to Australia. Sophie lives in Melbourne and has traveled every state and territory in the country. She writes about getting reliable signal in places like the Kimberley, Kangaroo Island, and the Whitsundays. Her guides explain how visitors from Europe, Asia, and North America can set up an eSIM before landing in Australia. Sophie also reviews airport pickup options for SIM cards at Sydney, Melbourne, and Gold Coast airports. She focuses on helping backpackers and working holiday makers stretch their data budgets.

Liam O'Brien

Liam O'Brien is a travel writer at HelloRoam who covers eSIM options and mobile data tips for travelers in Australia. Based in Sydney, Liam writes about staying connected on long drives through the Outback, coastal trips along the Great Ocean Road, and city hopping between Melbourne, Brisbane, and Perth. He tests network coverage in remote areas like Uluru, the Daintree Rainforest, and Tasmania. Liam helps readers understand which data plans work best for Australia's vast distances. His guides also cover Wi-Fi availability at hostels, campgrounds, and popular surf spots along the east coast.