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You are here: Home > Frequently asked questions > How will it work on mobile phones? > Will the messages be received by mobile phones on the 4G network?

Will the messages be received by mobile phones on the 4G network?

Mobile telephone handsets attached to Telstra 4G networks can be detected by the Emergency Alert warning system and can be sent a warning message based on their last known location.

Mobile telephone handsets attached to Optus and Vodafone 4G networks that have made or received a phone call in the preceding hour will be included. Mobile phones on Optus and Vodafone 4G networks that have not made or received a call or sent or received a text message may not have the latest location information available for the Emergency Alert warning system.

4G mobile telephones used outside the 4G network coverage areas revert to the 3G/2G networks where they can still be detected by the carriers and can be sent a warning message from the Emergency Alert system.

All mobile telephones on the 4G networks will continue to receive messages based on their registered service address.

Optus and Vodafone are investigating a 4G solution that is compatible with Emergency Alert.