The OPTUS SIM can be activated online prior to entering Australia (they let you verify your ID by using any international credit card).
First figure out which plan you want at: http://www.optus.com.au/shop/mobile/prepaid
ie if you buy the $30 preloaded SIM, then most likely the $30 Prepaid Ultimate plan
1. ENTER YOUR SIM NUMBER
2. YOUR DETAILS
3. YOUR NUMBER
4. YOUR PLAN
- There are 3 different types of plans for you to choose from, "MY PREPAID ULTIMATE", "MY PREPAID DAILY PLUS" AND "MY PREPAID LONG EXPIRY". Select the one suitable for you.
- You can recharge your sim right away or you can recharge it later.
6. YOUR IDENTITY
- If you are not Australian citizen, select "Foreign Passport (Australian Visa)"