Mobile Telco in Australia

Telstra Corporation Limited
Telstra or Telstra Corporation Limited (often abbreviated as Telstra Corp) is an Australian telecommunications and media company, formerly owned by the Australian government and privatised in stages from the late 1990s. Telstra is the largest provider of both local and long distance telephone services, mobile services, dialup, wireless, DSL and cable internet access in Australia. Telstra's headquarters are located at the Telstra Corporate Centre in Melbourne, Australia.

Formerly Telecom Australia, the company was renamed in 1993 under the brand of Telstra. It was privatised in stages between 1997 and 2006.
http://www.telstra.com.au/

Optus Communications Pty Limited
SingTel Optus Pty Limited is the second largest telecommunications company in Australia, and is a wholly owned subsidiary of Singapore Telecommunications . The company primarily trades under the Optus brand, while maintaining several wholly owned subsidiary brands, such as Virgin Mobile Australia and Boost Mobile in the mobile telephony market, Uecomm in the network services market and Alphawest in the ICT services sector.

To provide services, Optus owns and operates its own network infrastructure, as well as using the services of other network service providers, most notably Telstra Wholesale. It provides services both directly to end users and also acts as a wholesaler to other service providers. Through its OptusNet brand, it provides broadband, wireless and dial-up internet services.
http://www.optus.com.au/home/

Savvy Communications (Aust.) PTY LTD
Savvytel is a mobile phone company based in St Leonards, New South Wales, Australia.

Savvytel began offering prepaid mobile phone access at rates lower than traditional carriers because, under the Telecommunications Act 1997, Savvytel are able to obtain a licence to purchase airtime at a rate lower than the carrier while still able to make a profit. Further, Savvytel was the first mobile phone company in the world to offer call credits that never expire.

In 2007, Savvytel introduced a range of cap plans that include calls to landlines (including over 200 international destinations), mobiles, SMS (national and international), voicemail and 13, 1-300 and 1-800 Numbers.

Savvytel also sells phone cards for prepaid calling to international destinations at a reduced rate.
http://www.savvytel.com.au/

Vodafone Australia Limited
Vodafone Australia is a mobile telephone company, a subsidiary of Vodafone Hutchison Australia. Vodafone Australia was formerly a wholly owned subsidiary of Vodafone Plc (which is based in the UK).

On the 10th of June 2009, after ACCC approval, Vodafone Australia merged with the Australian subsidiary of Hutchison 3G (known by its '3' brand) to become Vodafone Hutchison Australia Pty Ltd, owned by Hutchison Telecommunications Australia (a subsidiary of Hutchison Whampoa) and Vodafone Group PLC on a 50-50 basis.
Phone products include prepaid and postpaid mobile services, on GSM and 3G UMTS mobile networks. Vodafone live! is Vodafone's mobile Internet service.
http://www.vodafone.com.au/

Virgin Mobile Australia
Virgin Mobile Australia (VMA) is a telecommunications company based in Sydney, Australia. They sell through over 3500 retail outlets, including flagship stores in Sydney, Melbourne and Brisbane, as well as via telesales and web-based stores.

VMA offers pre-paid, monthly and CAP plans for mobile phones. It also has two wireless broadband products: Broadband At Home and Mobile Broadband.
http://www.virginmobile.com.au/

AMTA
The Australian Mobile Telecommunications Association (AMTA ) is the peak industry body representing Australia’s mobile telecommunications industry. AMTA members include mobile Carriage Service Providers (CSPs), handset manufacturers, retail outlets, network equipment suppliers and other suppliers to the industry.

AMTA members represent an innovative industry with annual revenue of more than $12 billion, more than 20,000 employees and a direct economic impact of $5.8 billion a year.

The mobile telecommunications industry has an even bigger indirect or spill-over effect on the broader economy of $6.4 billion because mobile telecommunications products and services make firms more productive.
http://www.amta.org.au/