The OP's public profile doesn't give his/her location, but depending on what it is, another option might be to get a phone and plan that don't need one. My U.S. T-mobile plan and three-year-old iPhone work fine pretty much anywhere on the planet. Voice, text, and data are all free except for outgoing calls, which are 25¢ U.S. per minute. It's on the plan I'd get anyhow, not a high-priced add-on "travel package." (When I call someone in the States for a long chat, I ask them to call me back.) I have no financial or other interest in T-mobile, but when I did the research, there's no better deal for a Yank who travels a lot. Unless you need an Australian number for other people to call, or will make a lot of calls to people who can't call a U.S. number back at no cost to them, check it out.