A nationwide test of Australia's emergency alert system, referred to as the "Australia Alert" or AUSalert, is set to sound on every mobile phone across the country. The test is designed to check that the emergency warning network functions correctly so that genuine alerts, such as those for bushfires or floods, can reach the public reliably in a crisis.

Authorities have also flagged an unintended side effect of the test: because the alert broadcasts to every phone connected to a network within range, it can inadvertently expose secret or secondary mobile phones, including those used by people concealing an affair from their partner. The article's available text is largely made up of unrelated Daily Mail headlines, so further specific details such as the exact date, time and rollout method of the test were not provided in the retrieved content.