[GUIDE] How to Jailbreak 4.1 iPhone 3GS/4,iPod Touch 3G/4G with greenpois0n
Download the greenpois0n.Make sure your device is plugged in to the computer and powered OFF. Double click the greenpois0n icon to run it, press “Prepare to Jailbreak (DFU),” and follow the instructions to put your device in DFU mode. NOTE: The “sleep” button is the top power button, the home button is the button on the face of the device.
When it’s finished putting you in DFU mode, you can let go of the home button, and press “Jailbreak!” in the bottom left of the greenpois0n program.
The iDevice will flash a white screen a couple times, and evenautally also start up in recovery mode – just let it sit. The entire process takes a couple minutes, during which greenpois0n will simply say “Jailbreaking…”
When it’ finished, it will tell you “Jailbreak Complete!” in the bottom left of the window, and you can press quit. That’s it! You’re jailbroken! Wait for the device to power on, and enjoy your newly jailbroken device.