[How To] Jailbreak iOS 4.3.3 while Preserving Older Baseband with Sn0wbreeze 2.7

Apple has released iOS 4.3.3 to the public a day back.. And i0n1c’s kernel exploit is not patched in this release, this means iOS 4.3.3 users can still have the untethered jailbreak using updated versions of Sn0wbreeze, Redsn0w & PwnageTool.

These updated tools work for following iDevices:

• iPhone3GS
• iPhone4 (GSM)
• iPod touch 3G
• iPod touch 4G
• iPad1
• AppleTV2G (v4.3 8F202)

Sn0wbreeze also works for Verizon iPhone 4 on iOS 4.2.8. If you rely on unlock, jailbreak using PwnageTool (MAC) or Sn0wbreeze (Windows).

Update: Sn0wbreeze 2.7.1 has been released to fix vibrator & battery issues.

Here’s a tutorial for using Sn0wbreeze 2.7 to jailbreak iOS 4.3.3 while preserving baseband so you can retain the unlock on iPhone 4.

I also recommend you to store SHSH Blobs of your currently installed iOS using TinyUmbrella. If you’re not happy with iOS 4.3.3, then you can go back to earlier iOS version using the saved SHSH Blobs.

Things you’ll need:

• iOS 4.3.3 IPSW – Download links here
• Sn0wbreeze 2.7

Step 1: Run Sn0wbreeze 2.7

Step 2: 4. Press OK to go on the next screen. Close the Credits and then press Next to go on the “Select IPSW” screen. Here select your IPSW file and click Next. The IPSW file will then be verified.

Step 3: Select Expert Mode -> Next and then General -> Next. You’ll see the following screen:

Here you can enable Hidden Gestures menu and install SSH. You can also have animated boot logo with sn0wbreeze 2.7. Also, if you don’t have the original carrier SIM, you can select the option to Hacktivate. Don’t bother with the root partition size. Click Next. You can also select Cydia packages to install. Suit according to your needs and after that click Next.

Step 4: Then you’re back on the main menu. On this screen, select Build IPSW and click Next.

Step 5: Your custom FW will then start building. This will take a couple of minutes to complete. After it’s done, you’ll get the following screen.

Step 6: Click OK and then you’ll get a screen with tutorial to put your iPhone into the DFU mode.

Follow the instructions on your screen to put your iPhone into the Pwned DFU mode. After your iPhone is in DFU mode, the screen will be blank. Connect to iTunes, press Shift + Restore, select the custom IPSW file from Desktop and iTunes will install update the firmware.

Here’s a screenshot after jailbreaking iOS 4.3.3 on my iPhone 4:

Also note, GEVEY Turbo Sim works on iOS 4.3.3.

If you get error 1600 while restoring, then:

1. Restart your PC/Laptop
2. Download iReb from ih8sn0w.com
3. Using iReb, put your iPhone into Pwned DFU mode.
4. Open iTunes and Restore

Cydia will be automatically installed to your iPhone.

To unlock older basebands, you need to install the latest ultrasn0w from Cydia.

If you have any more questions, feel free to ask below..

Tagged as: baseband, how to, ios 4.3.3, jailbreak, preserve, sn0wbreeze 2.7, untethered