How to Update Baseband to 06.15 in iPhone 3GS/3G

Dev Team has released ultrasn0w open the iPhone 3G and iPhone 3G baseband is 6:15. But before you open your baseband update 5:14:02 to 6:15 to get to it. So here we guide you to update your iPhone 06.15.If old bootrom 3G and is already locked, but you want to get 4.2.1, the iPhone Dev Team Release expect, “” informal “bouquet for you.

Dev Team Pwnage Tool has been updated to update Baseband.Just just follow this step by step instructions and you can upgrade and unlock the iPhone.

Firsty of all download:

Copy everything to your desktop,you just downloaded. Now, Lets start updating the baseband:
Step 1: Launch Pwnage Tool and select iPhone 3GS/3G and direct it to the iOS 4.2.1 firmware you just downloaded.

Step 2: Now you have to Update to 06.15 if you are on 05.14.02 or lower, Click “Yes” for update. Now browse the IPSW File i.e iOS 3.2.2 and select it.

Step 3: You’ll have to choose some options as installing Cydia packages, custom logos and packages. Finally, hit the blue the build button.

Step 4: Now at that point you’ll be asked to saved the Cooked firmware, Allow it and Wait.

Step 5: If you are asked if the iPhone has been Pwned before, we clicked No, it allows for more accurate returns. Once done, you need to put the device in DFU mode, follow these simple instructions to set up the device in DFU mode:

First of all, hold the Sleep / Wake button for 2 seconds.
Press and hold the SLEEP button, press the Home button for 10 seconds.
Now release the Sleep function, but continues to hold the Home button for about 15 seconds.

Step 6: Now you need to restore your iPhone jailbroken custom firmware by holding onto the iPhone icon in iTunes, then the left sidebar to the left “Alt” key (Shift key on Windows) on the keyboard and select the “Restore” release the ALT key, select the custom firmware created by PwnageTool and give iTunes a few steps to go.

Step 7: You’re done, you can upgrade your baseband and unlock the device. Just follow these instructions to unlock your iPhone 3GS/3G.

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