The best part of Sn0wBreeze is the ability to preserve baseband which means if you’re on an older firmware (means you’ve 05.11.07 or older Baseband) and go to firmware 3.1.3 using Sn0wBreeze, you’ll then be able to unlock your iPhone 3GS, 3G and 2G .
Guide to Jailbreak iPhone 3G/3GS/2G with Sn0wbreeze
1. Download and install the latest version of iTunes.
2. Start iTunes and sync your iPhone with your PC.
3. Download Sn0wbreeze and the original iPhone OS 3.1.3 for your version of iPhone. Move all these files to your desktop.
4. Start Sn0wbreeze and select “Simple Mode”.
5. Select the correct 3.1.3 firmware .ipsw file by clicking the “Browse” button.
6. Click on “Yes” when Sn0wbreeze asks you “Do you want to activate your iPhone?” for hacktivation. Click on “No” only if you are on an officially supported carrier like AT&T.
7. Sn0wbreeze will now create the custom .ipsw file for your iPhone which will be jailbroken.
8. Now you will have to restore your iPhone to this custom firmware 3.1.3 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.
9. Sit back and wait for iTunes to do the rest for you.
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