Just after the official launch of iOS 4 for iPhone and iPod touch the jailbreak software for iOS4 is released by the iPhone DeV team. This team have posted an update for Redsn0w software i.e Redsn0w 0.9.5. With this software not only one can jailbreak iOS 4 but can also make many other hacks into iOS 4.
If you have yet now updated to iOS 4 you can do so via iTune 9.2.
Step by step how to do Jailbreak iPhone 3G?
1. You need to have iOS4 installed either from iTune or the direct link given at the end.
2. Now launch redsn0w 0.9.5 and browse the iOS 4 firmware file.
3. Frst verify then click install (here you can select the features required)
4. Follow the instructions provided on the screen
5. Your device will reboot and all is done.
The apple iOS 4 can be downloaded from the apple official link given below.