Now you can use step-by-step guide here to unlock i Phone 3G/3GS baseband on i OS 4.1.

Update#1: Download Tiny Umbrella (Fix Recovery) to fix i OS 4.2.1 recovery mode loop issue.

Note: Using Rec Boot or Tiny Umbrella (Exit Recovery) to kick your i Phone out of recovery mode loop will be of no use as these tools are only valid for i Phones running i OS 3.1.x and i OS 4.0.x/4.1.

Thanks to Notcom who released this special version of Tiny Umbrella called Fix Recovery which can actually kick all i Phone 4/3GS users out of i OS 4.2.x and i OS 4.3.x recovery mode loop using Green Pois0n exploit.

With the release of firmware 2.2 and Pwnage Tool 2.2.1 for i Phone jailbreak, now I have updated the jailbreak guide for firmware 2.2 using Pwnage Tool. For me, I accept the default settings and set it to 535MB. Note: If you are using a legitimate i Phone from official carrier (for instance, i Phone with AT&T), you will need to uncheck “Activate the i Phone”. Next, select “Bootneuter” and click the blue arrow. You should see your i Phone come back with firmware 2.2 (look at the version field) 23.

I want to cut it short and go straight to the jailbreak procedures. First, make sure you have upgraded to i Tunes version 8.0.2 and backup your i Phone data by synchronizing it with i Tunes Tip: You can download older version of i Tunes here if Apple already releases a newer version of i Tunes at the time you’re reading this post. Download all the files including Pwnage Tool 2.2.1, bootloader and i Phone firmware 2.2 (2G / 3G) Please use Firefox to download i Phone Firmware 2.2. Place the i Phone firmware 2.2 file to “~/Library/i Tunes/i Phone Software Updates”. You will be go through several configuration screens. Finally, you can sync back all your data using i Tunes.

Keep holding the “Home” button until you see a dock cable pointing to the i Tunes icon (or yellow triangle for older version of i Phone). You can go to step 18 to continue with the procedures.

The latest version of Ultrasn0w (v1.2) can not unlock i Phone 3GS/3G baseband 05.14or 05.15

Before you may proceed, please read this official disclaimer by Once you have successfully created the i OS 4.1 custom IPSW through Pwnage Tool and your i Phone is in DFU mode, launch i Tunes and click on the name of the device from the side panel to view the summary page.

Now you will see two buttons, Check for Updates and Restore.

Tips: To put your i Phone into recovery mode, first disconnect your i Phone from USB cable and power off your i Phone. You should follow exactly the instructions to put your i Phone in DFU mode.