Australian Mobile Carriers

Australia has three major mobile – Telstra, Optus and Vodafone/Hutchison Australia. Each of them offer both 2G and 3G networks.

Telstra
2G: 900/1800
3G: 850 (Next G network) / 2100
Check Your Coverage on the Telstra Network

Optus
2G: 900/1800
3G: 900 (Open Network for non-metro areas) / 2100 (metro areas)
Check Your Coverage on the Optus Network

Vodafone
2G: 900/1800
3G: 900 (Regional areas) / 2100 (Metro areas) / 850 MHz (Some Metro areas)
Check Your Coverage on the Vodafone Network

Three Mobile (Now part of Vodafone)
2G: Via Vodafone and Telstra
3G: 850 (Roaming on Next G network in some areas) / 2100 (3GIS network; future uncertain)
Check Your Coverage Here