可以考虑tpgmobile的$1 Pay as you go plan, 开通国际漫游好像需要20刀押金。第一次注册的费用有点大。
注册41. 漫游要120才能开启。实际最少投入 141刀 才可以使用。太贵了。 http://www.tpg.com.au/mobile/intlroaming/C#roaming_rate。
At the time of registration a roaming deposit of maximum $120 will be charged to activate the service (this means your existing deposit will be increased to $120 to get international roaming kicked off).