“Downgrading”:http://code.google.com/p/iphone-elite/wiki/DowngradingBaseband your Baseband firmware fixes the bricking of your iPhone. If you upgraded to firmware 1.1.1 and this wiped our your iPhone, this will fix things. Basically, you download the 1.0.2 and reload it onto your iPhone

This actually fails because the 1.1.1 upgrade does two things, upgrades the software for the central processor and also upgrades the lowlevel firmware that runs the phone itself.

So you then have to jailbreak the phone so you can change software on it and then extract the baseband firmware and eeprom files then use a package called iEraser2. It does require you have some magic called “secpack” that is the key to it all.

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