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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?


Emergency Alert can send text messages based on both the registered service address of a mobile phone and the last known location of the handset at the time of the emergency. This includes visitors and people travelling in the area.

The location based service relies on each carrier to detect and locate every mobile phone with a last known location within the warning area set by the emergency services.

Since January 2014, Telstra has provided the location based service across its networks, including 4G.

Previously, this was only available on Optus and Vodafone’s 2G / 3G networks however, both networks now provide the service on their 4G networks.

This includes Telstra, Optus and Vodafone’s wholesale partners who resell the carriers’ 4G networks.

All 4G mobiles revert to the 2G/3G networks when outside 4G coverage.