Can I use my mobile phone over there?

Most major networks will work in Australia, however you will have to ring up your network provider and ask to get your phone unlocked to enable this. If you’re going to be down under for more than a couple of weeks then you should think about buying an Australian Sim-card. They cost about $20 and usually come with some free minutes.

Other Questions...

How much is a beer?
Can I claim my tax back after I leave?
How much can I expect to get paid?
How much are flights to Oz?
Do I need to buy travel insurance?