iH8sn0w’s Sn0wbreeze 2.3 beta 1 is now available to jailbreak iPhone 4 4.3 iOS and jailbreak iPhone 3GS 4.3 iOS. Sn0wbreeze 2.3 also lets you update to iOS 4.3 without upgrading your baseband. It’s tethered jailbreak at the moment and you will need a tool like iBooty to boot tethered. Here’s the Sn0wbreeze 2.3 tutorial:

How to Jailbreak iPhone 3GS, iPhone 4 4.3 iOS

What you need:

For convenience, keep all the downloaded files at same place.

Step 1: Extract the sn0wbreeze.zip and launch the sn0wbreeze-2.3b1.exe and click on Next button.

Launch Sn0wbreeze

Step 2: Browse for iOS 4.3 IPSW and select it.

02-Sn0wbreeze-select-ipsw

Sn0wbreeze will now identify the IPSW. Once it does, click Next button. For iPhone 3GS, it will ask if your device is New Bootrom or Old Bootrom.

03-Sn0wbreeze-identify-IPSW

Step 3: Select the mode you want to start sn0wbreeze in and click Next.

05-Sn0wbreeze-Select-Mode

Simple mode is recommended for common users with factory unlocked iPhone. Baseband Preservation Mode is for those who want to update the iOS without upgrading the basbenad.

Step 4: Sn0wbreeze will ask if you wanted to hacktivate iPhone. Click yes if you’re on unofficial carrier, click no otherwise.

Step 5: Sn0wbreeze will now start the process to jailbreak iOS 4.3 IPSW.

06-Sn0wbreeze-Custom-IPSW

Step 6: Once jailbreak process completes, sn0wbreeze place the jailbroken iOS 4.3 IPSW along with the iBooty-4.3 folder on your desktop and will display the Done message. Click OK.

07-Sn0wbreeze-done

Sn0wbreeze DFU Pwner will start now. It will show you onscreen instructions to put iPhone in DFU mode.

Step 7: Switch your device off and connect it to the PC. Then click Start button.

08-sn0wbreeze-turn-off-device

Step 8: Now follow the onscreen instructions to get into DFU mode.

09-sn0wbreeze-in-DFU-mode

Step 9: Once in DFU mode, start iTunes to load custom IPSW.

  • iTunes will display a message saying “iTunes has detected an iPhone in recovery mode. You must restore this iPhone before it can be used with iTunes.”, click OK.

iTunes-in-DFU-Mode

  • You’ll see the “Restore” button in iTunes.

iTunes-Restore-in-DFU-mode

  • Press and hold Shift key (Windows) or Alt key (for Mac) and click on “Restore” button.
  • Browse for the custom IPSW that you created using Sn0wbreeze (on your desktop).

iTunes-browse-IPSW

  • iTunes will now confirm if you wanted to restore to the selected IPSW, click “Restore”.

iTunes-Restore-confirm

Step 10: Boot Tethered with iBooty

Once iPhone restore to custom iOS 4.3 firmware IPSW, you will have to boot tethered with iBooty. To do this:

  • Open the directory iBooty-for-4.3 placed on your desktop.
  • Run the iBooty.exe to start iBooty.

iBooty

  • Click Start and follow the onscreen instructions to boot tethered.

Phew! That’s it. Finally you can run Cydia from Springboard and start the fun!

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