It is best to purchase a SIM card or Australian mobile number when you arrive in Australia, as using your home phone number will incur high costs. European phones work on Australia's network, but most American and Japanese phones don't. Use global roaming or a local SIM card and a prepaid account.
Australia's main telecommunication companies:
Optus (1800 780 219; www.optus.com.au)
Telstra (13 22 00; www.telstra.com.au)
Virgin (1300 555 100; www.virginmobile.com.au)
Vodafone (1300 650 410; www.vodafone.com.au)