Australia's Nationwide AusAlert Test Alerts Millions of Phones

On 27 July 2026 the Australian federal government carried out the first nationwide trial of its upgraded emergency warning system, AusAlert. The critical alert was transmitted at the same moment across the country – 2 pm AEST in the eastern states, with corresponding local times in other zones – and appeared on compatible phones, tablets and smartwatches as a pop‑up labelled “CRITICAL AUSALERT” together with a ten‑second loud siren that overrides silent and Do‑Not‑Disturb modes.

The test uses cell‑broadcast technology, meaning it reaches devices without relying on SMS or a SIM card, and is intended to work even if mobile networks are congested. Older devices may display different wording such as “Presidential Alert.” Authorities noted that some devices might behave differently, and the test highlighted concerns for people experiencing domestic violence who keep “safe phones.” AusAlert was developed after the 2019‑2020 Black Summer bushfires and further motivated by the COVID‑19 pandemic and the Bondi attack, aiming to provide instant, reliable alerts for natural disasters, public‑health emergencies and security threats ahead of its full rollout on 1 October 2026.