Downgrading 2.0 Firmware 1st generation iPhone 3.9/4.6 bootloader

So you mistakenly updated your firmware as soon as a new version was released by Apple, and you are now left with a useless iPhone showing only this graphic.

This tutorial will teach you how to restore your iPhone to a functioning state. Thanks go out to crumpx (who has some Windows based notes here), and BigBoss (who has a Windows downgrade guide here), who provided help with the location of the various files that must be deleted, and the order of the overall process. There may be other ways to do this, but this is what worked for me.

When the next release of PwnageTool comes out it may render this method obsolete, but I don’t know for sure. You might also consider waiting for the new version of PwnageTool to come out as it may simplify this process.

This tutorial is for people with the first generation iPhone, running either the 3.9 or 4.6 bootloader, but who did NOT use PwnageTool to install and run Boot Neuter, or the Installer to install and run Boot Neuter on their iPhone.

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