I would like to share my experience with Vodafone ireland prepaid sim card with which you can surf in Australia and almost anywhere in Europe for 0,99 euro = 1.4 AUD per day with a limit of 50MB per day (24 hours). If you download more then you will be charged extra. There is no need to buy any addons for this you just need to set up your APN to live.vodafone.com.
I am using this sim card during my camping in Australia.
Here is a map where is it available to use this internet : http://www.vodafone.ie/planscosts/prepa ... sport/map/
I have bought this sim card on ebay from seller IESIM with 36 euro credit already topped up so I had enough credit for more than a month browsing. I have bought activated and not registered sim card which I have then registered online to my name and address. Then I have just used my unlocked USB broadband dongle set live.vodafone.com APN and it worked !
SIM card arrived in just 2 days. And as a bonus I can send 600 free SMS every month to any number in world for free from Vodafone.ie.
If anyone interested links to ebay auction here :http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 262wt_1122http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 637wt_1138http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 301wt_1138