[dogma1138]

Apple doesn't and as far as I can tell cannot sign a version for an individual phone a signed binary by apple that removes the security settings for a phone lock/wipe will be valid for any other apple phone as long as you can trigger an update which you can using iTunes you should be able to deploy it on any device you want.

There are no individual singing keys for phones that would be unmanageable there are probably a handful (or even a single one) singing keys that apple has which are valid on their devices and that's it.

[nickik]

That is wrong. The phones have hardware ids and those can be checked in code. They can sign a binary blob that runs on one phone only.

[dogma1138]

No its not, phones have hardware ID's that are used to generate the encryption key (on phones with a secure enclave, this isn't even one) I have seen no evidence that there is any specific per phone signing of apple software.