This tutorial is for the Windows Operating System ONLY.

This tutorial is for iPhones on 1.1.2 that were upgraded ONLY. This is not suitable for brand new iPhones on 1.1.2 

Ready? Let's go.

Download the pack below:

http://rapidshare.com/files/72345078/iphoneunlockaustralia112downgrade.rar.html

Start by plugging your iPhone into iTunes in restore mode (hold home and sleep buttons for 10 seconds, then release the sleep button)

iTunes will recognise it right away. You will see a restore button. Hold shift and click restore. Navigate to your 1.1.1 firmware file.