Sn0wbreeze 2.0 was released just some time back by iH8Sn0w. As you might already know, Sn0wbreeze is like PwnageTool for Mac, using which you can cook your own custom firmwares of iOS 4.1 on Windows without having to upgrade your baseband. This would ensure you can unlock your iPhone using ultraSn0w later on the older baseband.
Sn0wbreeze 2.0 supports following devices:
- iPod touch 1G (Must be jailbroken on any firmware version)
- iPod touch 2G (Non-MC Model, must be jailbroken on any firmware, if not, then use iREB from here)
- iPod touch 2G (MC Model, must be on iOS 3.1.2. Does not need to be jailbroken on 3.1.2)
- iPod touch 3G (Must be previously jailbroken on 3.1.2)
- iPhone 2G
- iPhone 3G (Must be jailbroken on any firmware, if not, then use iREB from here)
- iPhone 3GS new bootrom (Must be previously jailbroken on 3.1.2)
- iPhone 3GS old bootrom (Must be already jailbroken. If you are jailbroken using Spirit or JailbreakMe, install Spirit2Pwn from http://repo.woowiz.net.)
NOTE: Sn0wbreeze 2.0 WILL NOT jailbreak iPhone 4, iPad and iPod touch 4G.
Guide to Jailbreak iOS 4.1 using Sn0wBreeze 2.0
Step 1: Download and install the latest version of iTunes.
Step 2: Start iTunes and backup all your important data
Step 4: Start Sn0wbreeze and select “Expert Mode”.
Step 5: Sn0wbreeze will now ask you to browse for your .ipsw file. Select the correct iOS 4.1 firmware .ipsw file by clicking the “Browse” button. Sn0wbreeze will verify the selected file
Step 6: Now if you are on iPhone 3GS (New Bootrom) or iPod touch 3G, make sure you hit “General”-> and check “Use iBooty Method (3.1.2 Installation Required!). Also check “Activate The iPhone” if you are on unofficial carrier and want Sn0wbreeze to hacktivate your phone.
Step 7: Now simply select “Build IPSW”. Sn0wbreeze will now create the custom .ipsw file for your iPhone which will be jailbroken.
Step 8: Now you will have to restore your iPhone to this custom firmware 4.1 that you just cooked using Sn0wbreeze for your iPhone. Click on your phone from the sidebar in iTunes and then press and hold left “Shift” button on the keyboard and then click on “Restore” (Not “Update” or “Check for Update”) button in the iTunes and then release the “Shift” button.
This will make iTunes prompt you to select the location for your custom firmware 4.1. Select that custom .ipsw file and click on “Open”.
Step 9: Wait for iTunes to complete the restore. Your iPhone screen at this point will be showing a progress bar indicating installation progress. After the installation is done, iPhone will restart automatically and you should now have a fully jailbroken iPhone running on iOS 4.1.
Unlock iOS 4.1 (old baseband)
Once you are done with the jailbreak, you can follow our step by step guide posted here to unlock your iPhone on iOS 4.x, on older baseband using Ultrasn0w.
Once you are done with the unlocking and jailbreak process. You can now restore everything you had backed up with iTunes at the start.
Disclaimer: The above guide is for information and education purposes only. Proceed at your own risk