We are going to Australia for a month at Christmas. My wife has a mobile telephone and she wants to use it there to call and text her family here in Thailand, is it simply a matter of buying a new SIM card in Australia and away we go or is it more complicated than that?

TIA,

Colin in Pai

that's pretty much it, just get a pre paid sim and youre off and running

http://www.virginmobile.com.au/rates/prepaid_compare.html