Australian Mobile Telephone Networks

Network Type	Band	Carriers	Notes
2G GSM + GPRS	GSM 900	Optus Telstra Vodafone	Main frequency for Australian GSM (2G) mobile carriers
	GSM 1800	Optus Telstra Vodaphone	Supplementary frequency for Australian GSM (2G) mobile carriers
3G WCDMA + HSDPA	UMTS 850	Telstra (NextG)	Used exclusively for Telstra's NextG 3G network
	UMTS 900	Optus (YesG) Vodaphone	Used by Optus and Vodaphone 3G networks in rural areas.
	UMTS 2100	Optus Telstra Three (3) Vodafone	The standard 3G frequency for Optus, Three (3), Vodafone and Telstra's non-NextG services.

The 2G GSM 850 and 2G GSM 1900 bands and the 3G UMTS 1900 band are not used by Australian carriers and mobile phones using those frequencies will not work in Australia.