Vodafone AU Offers Free Unlock For The iPhone 4
If you had bought an iPhone 4 from any Vodafone stores in Australia you can get it unlocked for free from Vodafone Australia website. According to the Vodafone website, the iPhone 4 handsets purchased from any Vodafone outlets in Australia can get it unlocked for free by just entering your IMEI number along with your credit card information. One of my friend has tired it and he was not charged for unlocking the iPhone 4 which is bought from Vodafone AU.
If your not an Vodafone customer, we recommend you to read – permanent remote unlock from CutYourSIM
Thanks to my friend Anthony for tipping us