The NBN is probably the last thing you want going down on you; there’s nothing worse than an internet outage. Outages can and do happen, but there are now a few NBN providers that offer 4G backup with their plans.
Vodafone has announced that it will be repurposing its metropolitan 2100MHZ 3G spectrum to be used on its 4G network. The telco has stated that this upgrade will help boost the 4G network capabilities in select areas.