Advocates are warning a nationwide emergency alert test could expose people using secret safety phones when a 10-second siren sounds on mobile devices.
The emergency warning system, to be used during local and national disasters, is being tested across several locations this week including in the outer Sydney suburb of Liverpool on Wednesday, before a wider test is rolled out in July.
A loud alarm and message will be sent to mobile phones during the test, prompting fears it could compromise the location of secret safety phones.
Victim-survivors having access to a safe phone that can't be tracked or monitored for emergency communications has been recommended by DV Safe Phone chief executive Ashton Wood.
A Safe and Equal spokeswoman told AAP on Wednesday that victim-survivors should take extra precautions ahead of testing in their location.
