So to clarify my understanding... i-whatevers have some sort of &quot;trusted computing&quot; bootloader or something... so can only boot a digitally signed version of the OS.<p>So even if the FBI dumped the firmware from the phone and found just the right branch instructions to flip to disable the time delay and data erasure... they couldn&#x27;t deploy the firmware because it wouldn&#x27;t boot.<p>Is that generally what the issue is?  And if it is... wouldn&#x27;t that mean that Apple is 100% correct in saying that creating such a firmware would allow &quot;law enforcement&quot; to do this to any phone in their possession (since they could install the same firmware on other Apple devices?)