Jailbreak iPhone 4, 3GS on iOS 4.1 with Greenpois0n [How to Guide]

STEP 1: Download Greenpois0n jailbreak (link at the end)

STEP 2: Connect your iPhone to your computer via USB then launch Greenpois0n jailbreak application and hit "Prepare to Jailbreak (DFU)" button.

STEP 3: Follow the steps shown on the next screen shots to put your device in DFU mode.
  • Now you have to press and hold the sleep button for 2 seconds.
  • Continue holding sleep, then press and hold home for 10 seconds.
  • Now release sleep button but keep holding home for 15 seconds. 
STEP 4: Your device is now ready for jailbreak , now hit "Jailbreak" button.
STEP 5: Now your device is being jailbroken.
STEP 6: Now press "Quit" button.
STEP 7: Restart your iPhone, now you will notice Loader application icon on your springboard, hit this icon.
STEP 8: Now press "Cydia", then "Install Cydia". After finishing you will be asked to remove Loader from your device, click "Remove", then press Home button, the device will restart automatically.




STEP 9: After your device restart you will find the Cydia icon, Congratulations.
Note: For who already have a jailbroken devices with limera1n jailbreak, don't follow this guide, as it will has no added value.

Download iOS 4.1 for iPhone 4/3GS.
Download Greenpois0n jailbreak for iOS 4.1.