[Tutorial] Jailbreak iPhone / iTouch / iPad 4.2.1 iOS with GreenPois0n
here’s a quick tutorial to jailbreak your iDevice in 4.2.1:
I recommend you restore your iPhone / iTouch / iPad before jailbreak. but normally it will work as well without.
download GreenPois0n for your platform:
– Mac (RC5 B3)
– Windows (RC5 B2)
Start GreenPois0n:
Now connect your iPhone / iTouch / iPad, then turn it off. Click “Jailreak” ,GreenPois0n will guide you to move your iPhone / iTouch / iPad in DFU Mode
Press the standby button and hold it:
While holding the standby button, press the home button and hold it too:
Release the standby button and keep pressing the home button:
After a few seconds, the jailbreak will start. You can release the home button and wait:
Once completed, a new application is available on your iPhone / iTouch / iPad “Loader”. Run it and install Cydia (watch what the iPhone does not go into standby):
You have to remove the application “Loader” on your iPhone (Options> Delete and then quit the application).