This is a guide to jailbreak iOS 4.0 GM on iPhone 3G S. Be aware that you need to possess an iPhone developer account to download and install iOS 4.0 GM, or you can join our beta tester team. Make sure your device’s UDID is registered before going further.
Things you will need:
– This special version of PwnageTool
– A device with a registered UDID
– iOS 4.0 GM for iPhone 3G S firmware (iPhone2,1_4.0_8A293_Restore.ipsw)
– iTunes 9.2 Beta
– a macintosh computer or hackintosh (PC running Mac OS X 10.6.3)
Download the firmware (iPhone2,1_4.0_8A293_Restore.ipsw) and place it on your desktop.
If you have a BOOTCAMP partition, please eject it or PwnageTool won’t find the ipsw.
Create a custom ipsw using the following instructions: