In my other post about Downgrade iPhone 3GS 3.1 to iphone 3.0 OS Firmware, I found that many people failed to downgrade their iPhone 3.1 to 3.0 but only few succeeded, therefore to assist iPhone OS 3.1 who wishes to downgrade to 3.1 but so far found nothing that actually works, I provide 1 Youtube video which is covering the matter at hand. Here is the video tutorial to downgrade to the 3.0.1/3.0:
This is proven worked for OS Windows, but may also works too for OS Mac
Many have tried the steps explained in the video, they were able to finally downgraded their iPhone or iPodTouch 3.1 firmware to 3.0.1/3.0, I hope you will be able too.
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