How to Jailbreak iOS 4

The revolutionary new iPhone/iPod Touch operating system, iOS 4, has been successfully jailbroken using Redsn0w. Here’s how:

1. Download Redsn0w forĀ Mac OS X or forĀ Windows

2. Connect your device to your computer and shut it off (slide to shut down)

3. Download the corresponding iOS 4 firmware for your iDevice from the “Downloads” section of

4. Open Redsn0w and browse for the firmware that you downloaded. Select “Next”

5. Select which features you’d like to be installed with the jailbreak (certain devices cannot have multitasking, homescreen wallpaper, or battery percentage so enabling those features gives that device the features)

6. Click “Next” twice and prepare to put your iDevice into DFU Mode

7. On the screen that shows you what to do to put your device in Recovery Mode:
Hold power button for 3 seconds
While still holding the power button, hold the home button for 10 seconds
While still holding the home button, release the power button and continue holding the home button for 30 seconds

8. Congratulations! Once your device reboots you should have Cydia on your home screen.

Feel free to leave a comment below stating what your favorite feature of iOS 4 is, if you enjoy jailbreaking, if you’ve had any problems, or any other sort of feedback, and please, share this post and with your friends.

16 thoughts on “How to Jailbreak iOS 4

    1. The reason why you're getting that, is because FOR NOW, this jailbreak is ONLY for the iPhone 3G and iPod touch 2G. Redsn0w will be updated soon, however, to accomodate for the other iDevices.

    1. You can downgrade ONLY if you've backed up your SHSH blobs. If you don't know what those are, you haven't done it and so you can't downgrade… you're stuck. If you have, you can download the firmware you want to downgrade to from the "Downloads" page here on and then when you go into iTunes, put your iPhone into DFU/Recovery mode, and then on the summary page in iTunes where it tells you info about your device, hold the SHIFT key (PC) or the Option key (Mac) on the keyboard while clicking the "Restore" button in iTunes. A window will pop up and you'll need to select the firmware you downloaded from wherever you saved it to. After that, it'll restore to that firmware.

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