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The process is identical to what you do to jailbreak an iPhone - which makes sense. In both cases, the device would need to be put in DFU (eg, the "help, I'm broken, iTunes please fix me") mode. You have to wonder if these guys actually do the R&D for the iPhone, or just take the work that's already been done by others like the iPhone Dev Team.
Since this is pretty much a guaranteed vulnerability anyway (at least, every iOS up to now can be jailbroken with a tether), a much more interesting question is how much harder is a longer/more complicated password to break? If this is literally a bruteforce enumeration, a reasonable password (that could be used for a computer) would be fairly safe.
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