How To Downgrade iPhone 06.15.00 Baseband to 05.13.xx

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This manner can even make it easier to fix your tool on the legitimate inventory firmware the use of iTunes which was once in any other case no longer that you can imagine on iPad’s 06.15.00 baseband.The process is somewhat simple, then again we might now not suggest beginner customers to take a look at this. We can additionally extremely suggest you to backup the whole thing to your instrument ahead of following the process. Proceed at your personal possibility most effective.(iPhone 3G Bootloader 5.eight Best)

Downgrade-iPhone

Here’s what you will need:

And the step by step procedure is as follows:

Step 1: Download the required certificate file ICE2-06.15.00.cert from here.

Step 2: Install Fuzzyband from Cydia and start this app.

Step 3: Connect your iPhone 3G with computer via USB cable.

Step 4: Start i-FunBox and click File, then navigate to Applications/Fuzzyband.app, right-click and then select Copy from PC.

Step 5: Select the ICE2-06.15.00.cert file you downloaded earlier and then copy it to this location: Applications/Fuzzyband.app.

Step 6: Now simply disconnect your iPhone from your computer and start Fuzzyband app (which you previously installed using Cydia) on your iPhone.

Step 7: In Fuzzyband, you will now see your current version of Baseband, (which should still be 06.15.00)
. But now you will have the option to downgrade it to version 05.13.xx.

Once you have downgraded, Go to Settings –> About, and scroll down to check your Baseband which should now read 05.13.xx (which is unlockable via Ultrasn0w). You can now also update or restore any firmware without iTunes throwing errors. [via iSpazio]

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