Our Authors
Meet the expert writers behind HelloRoam Blog
Every guide on HelloRoam Blog comes from a writer who has used the eSIM, the carrier, and the country first-hand. Our authors are travel writers, expat residents, and connectivity researchers who test plans on the ground in the destinations they cover. Bios list each writer's home base, the countries they specialize in, and the publications they have written for. We update articles as carrier coverage shifts, prices change, or rules around tourist data plans evolve, and every update notes what was changed and why.
We do not run sponsored posts and we do not list affiliate links from carriers or competitors that we have not tested. When a writer recommends a plan, the recommendation is based on real network performance, real activation experience, and real travel use cases. If a plan disappoints, we say so. Browse the authors below to find a writer covering your destination, your travel style, or your home region. Each profile links to the articles the writer has published, so you can review their work and professional background before you trust the advice.
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.
28 articles
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.
4 articles