Compatible phones across Australia will sound a loud emergency alarm today, July 27, as the federal government conducts the first nationwide test of AusAlert. The simultaneous test begins at 2pm AEST, 1.30pm ACST and 12pm AWST, depending on location.
The Critical Alert will make devices vibrate and play a siren-like sound for about 10 seconds, even when silent or “do not disturb” mode is enabled. The message will clearly state that it is a test and no action is required.
AusAlert test times across Australia
The alert is scheduled for 2pm in New South Wales, Victoria, Queensland, Tasmania and the Australian Capital Territory.
It will arrive at 1.30pm in South Australia, the Northern Territory and Broken Hill, at noon in Western Australia and at 11am on Christmas Island.
Some people may receive it later, while others may not receive it at all. This can depend on the device, software version, mobile provider, signal and nearby tower.
What will the 2pm alert look and sound like?
The notification should appear as “Critical AusAlert” with a message confirming that Australia’s new emergency warning system is being tested. It can interrupt a phone call, appear while an app is open or wake a locked screen, and will remain visible until dismissed.
Older devices or alternative systems such as GrapheneOS and LineageOS may display “Presidential Alert” or “Extreme Threat Alert.” The accompanying text should still identify it as an Australian government test.
Which phones are compatible with AusAlert?
Expected compatible devices include iPhone 11 and newer models running iOS 26.4 or later, plus Android phones using Android 12 or newer software.
Apple Watch SE 2, SE 3 and Series 6 or later require watchOS 26.4 or newer. Some cellular tablets and other smartwatches may receive the notification, but Apple iPads will not receive AusAlerts.
A working SIM card is not required. However, the device must be compatible and connected to an active 4G or 5G mobile tower when the alert is broadcast.
How to turn off the AusAlert test
Critical Alerts cannot be disabled through normal notification settings. Silent mode, reduced volume and “do not disturb” will not prevent the alarm.
The only way to avoid today’s test is to switch off the device or place it in aeroplane mode beforehand and leave it disconnected for at least one hour.
This guidance is particularly important for domestic and family violence survivors who keep a hidden “safe phone.” People caring for babies or anyone sensitive to sudden sounds may also want to prepare.
Drivers should keep their attention on the road and check the notification only after stopping somewhere safe and legal.
How AusAlert works without sending an SMS
AusAlert uses cell-broadcast technology to transmit one warning from mobile towers to compatible devices inside a defined area. It does not require an app, registration or individual telephone numbers.
The dedicated broadcast channel is designed to deliver messages quickly when conventional networks are congested. Government information says alerts can be geographically targeted with accuracy of approximately 160 metres.
The one-way system does not use GPS or collect names, locations, phone numbers or financial information. Only authorised emergency services and Australian government agencies can issue an AusAlert.
Why Australia needs a new warning system
AusAlert was developed following a recommendation from the Royal Commission into National Natural Disaster Arrangements after the 2019–20 Black Summer bushfires. During previous emergencies, some SMS warnings were delayed or failed to reach visitors connected through unavailable providers.
Recent incidents such as the Telstra outage that disrupted transport and payment services have highlighted the wider consequences of telecommunications failures.
Once operational, AusAlert may warn communities about bushfires, floods, cyclones, tsunamis, health emergencies, biosecurity threats and major security incidents. A real message will explain the danger, location, severity and action people should take.
Adelaide cafe closes before the alert
Grounded Lonsdale, south of Adelaide, attracted attention after asking customers to switch off their phones between 1pm and 2pm. The business later announced it would close at 12.30pm instead of its usual 2.30pm closing time.
The cafe referred to concerns about an alleged “harmful frequency,” but government guidance says AusAlert does not create a health risk. Authorities have warned people not to place phones in microwaves, foil or metal containers.
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What happens after today’s AusAlert test?
The nationwide exercise follows trials conducted in nine urban, regional and remote communities during June. Officials will study differences across devices, networks and locations before AusAlert launches on October 1, 2026.
People whose phones remain silent do not need to take immediate action. Updating and restarting the device may improve compatibility, while feedback can be submitted through the official AusAlert national test page.
The platform will operate alongside radio, television, emergency websites and existing warning services. The Optus Triple Zero outage inquiry and network reforms provide further context for Australia’s push to strengthen emergency communications.
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