There has been an on-going debate about the possible cancer effects of cell/mobile phone use. However, this article gives a different spin to the debate, that there is apparently a danger message in the actual phone itself, or at least American phones. I have no idea whether this is applicable to phones that one can get in Australia, but for what it is worth:
https://articles.mercola.com/sites/articles/archive/2020/02/18/hazards-in-your-cellphone.aspx?cid_source=dnl&cid_medium=email&cid_content=art3ReadMore&cid=20200218Z1&et_cid=DM460376&et_rid=813006445
“In 2017, Wendy Mesley with Canada's CBC News conducted an investigation into a little-known fact about cellphones. Inside the manual is a warning, one that could drastically change the use of cellphones as you know it — if only it were taken seriously. In short, the warning states to keep the phone a certain distance away from your body — usually 5 to 15 millimeters (mm), or two-tenths to six-tenths of an inch — to limit exposure to radiofrequency (RF) exposure to under the federal safety limit. In the video Mesley asks random cellphone users to try to find the warning hidden in their phone, and none are successful. She pulls it up on her iPhone, reading: "To reduce exposure to RF energy, use a hands-free option, such as speakerphone … Carry iPhone at least 5 millimeters away from your body to ensure exposure levels remain at or below the as tested levels." If you carry your phone in your pocket or your bra, or hold it against your ear when you talk, you're violating this warning with unknown health consequences.