You seem to still fundamentally misunderstand the situation, as you seem to be challenging me to build the tool today and get Apple off the hook, as if that was all that mattered.<p>I can build the tool. What I can&#x27;t do is sign the result. The only thing any of us are missing is the 4096-bit RSA encryption key used to sign the firmware. The way we load this tool onto the iPhone 4 is using a vulnerability in their bootloader that lets us bypass the signature check. There is only 512 bytes of data at question here, not some insurmountable amount of work.