The Telstra Smart Modem Gen 2 will provide 4G voice failover in the event of a broadband outage or a delay in migrating to NBN services. Written by Corinne Reichert, Contributor Oct. 29, 2018, 5: ...

If you have a Telstra Smart Modem 2 and want to upgrade to a Smart Modem 3 you can, but for an extra AU$9 per month. However, you’ll need to physically visit your nearest Telstra store to upgrade.