Can someone explain this to me? The FBI requests a new version of iOS to be installed on a single phone that was involved in the attack. What, exactly, does this mean? If the phone is locked, how will they install new software on it without unlocking? People are suggesting an update to iOS that will get pushed-out to all users, but contain a backdoor that is specific to that one particular device -- but how will the new iOS version be installed without unlocking first?