@JanetCr_2381889 Australia has turned off 3G but has blocked many phones in the process due to a legal point. Please do follow the link from @SmartyTrousers and there is a lot more on the internet about this.
I would imagine that any Australian will be able to also give you a load more info.
Unfortunately, it seems to be difficult to know which phones will work there - it's not just a matter of which brand.
