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Guide to Jailbreak iOS 4.1 on iPhone 3GS (Old + New Bootrom) with Sn0wbreeze 2.0

The much awaited tool Sn0wbreeze 2.0 has been released by iH8sn0w to jailbreak iOS 3.1.x, 4.0.x and 4.1 on iPhone 2G, 3G & 3GS (Old or New bootrom) and iPod Touch 1G, 2G (MC or Non-MC) & 3G. For those who don't know, Sn0wbreeze is a PwnageTool port on Windows which cook custom IPSW files just like PwnageTool do on Mac.


iPhone 3GS (Old Bootrom): Must be already jailbroken on any firmware. If jailbroken using JailbreakMe, install Spirit2Pwn from Cydia repo.

iPhone 3GS (New Bootrom): Must be on iPhone OS 3.1.2, doesn't require to be pre-jailbroken on iPhone OS 3.1.2. You need to check special check-box while creating custom IPSW of iOS 4.1.

Woowiz Repo Spirit2Pwn

Steps to Jailbreak iOS 4.1 on iPhone 3GS with Sn0wbreeze 2.0 on Windows:

*Find download links at the end of post.

  1. *Download and install iTunes 10
  2. *Download Sn0wbreeze 2.0 and install .NET Framework 3.5
  3. *Download iOS 4.1 IPSW file for iPhone 3GS.
  4. Place iOS 4.1 IPSW file and sn0wbreeze-V2.0.exe on your desktop.
  5. Connect your iPhone to iTunes to backup your contacts, apps, music, photos and other important data.
  6. Double-click sn0wbreeze-V2.0.exe to launch Sn0wbreeze 2.0. Click OK button to ignore the warning message and Next button to proceed to next step.
  7. Jailbreak iOS 4.1 with Sn0wbreeze 2.0
    Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  8. Choose Expert Mode and choose next.
  9. Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  10. Now Sn0wbreeze will prompt for IPSW file, click Browse button to locate IPSW file of your iOS 4.1 firmware.
  11. Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  12. Once you provide the IPSW file of iOS 4.1 to Sn0wbreeze, it will process and verify it.
  13. Jailbreak iOS 4.1 with Sn0wbreeze 2.0
    Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  14. Once Sn0wbreeze verifies iOS 4.1 IPSW file, click on Next button and choose General.
  15. Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  16. Note that if you are iPhone 3GS (New Bootrom) or iPod touch 3G user, you need to check the Use iBooty Method (3.1.2 Installation Required!) option. Moreover if you are on unofficial carrier, choose Activate The iPhone to do a hacktivated jailbreak on your device.
  17. Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  18. Now click on "Build IPSW" and Sn0wbreeze will cook a custom IPSW of iOS 4.1 for your device.
  19. Jailbreak iOS 4.1 with Sn0wbreeze 2.0
    Jailbreak iOS 4.1 with Sn0wbreeze 2.0

  20. Thats it! Now you will see sn0wbreeze_iPhone 3GS-4.1.ipsw on your desktop.

How to Restore iOS 4.1 Custom IPSW File with iTunes:

Connect your iPhone in DFU mode. To do that just hold "Power" and the "Home" button for exactly 10 seconds and then release "Power" button but keep holding "Home" until iTunes detect your iPhone in Recovery Mode.

On the summary page, hold down the SHIFT key on keyboard and press Restore button. You will be asked to choose the firmware file you want to restore, choose the custom IPSW file of iOS 4.1 you just created with Sn0wbreeze. If you are a Mac OS X user, use the ALT+Restore combo to choose the firmware file.

Restore iPhone or iPod Touch Through iTunes

To unlock your iPhone 3GS with old baseband, you can use Ultrasn0w. You can follow our step-by-step guide here to unlock your device with Ultrasn0w 1.1-1.

Download Links:

Download iTunes 10
Download iOS 4.1 for iPhone 3G, 3GS and iPod Touch 2G, 3G
Download .NET Framework 3.5 (Must for Sn0wbreeze 2.0)
Download Sn0wbreeze 2.0.1 for Windows

Update1: How to Jailbreak iOS 4.1 on iPod Touch 2G(MC+Non-MC), 3G with Sn0wbreeze 2.0?
Update2: Sn0wbreeze 2.0.1 Released to Fix iTunes Error 37 During iOS 4.1 Jailbreak
Update3: Sn0wbreeze 2.0.2 Released to Fix Error 40 / 17 and Hacktivation Issues

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Leave a message...

    Jerry Ramirez4 years, 8 months ago

    i tried to restore with custom ipsw file but when i de i get error1601. and ideas?

    Zach6 years ago

    Where do i find the ipsw file? i have looked everywhere and downloaded all 4 of ur files none of them work??

    Eduardo6 years ago

    How can I use iReb for do this procedure in an ipod touch 2G without any jailbrake. Thanks.

    itstricky6 years, 1 month ago

    Stand back ! STAMPEDE !!!! Thanks, I’ll wait for the dust ta settle !!!