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Maybe I missed this in the article, but does anyone know if this feature can be turned off? Or if it's enabled by default? What happens in the scenario of a co

Maybe I missed this in the article, but does anyone know if this feature can be turned off? Or if it's enabled by default? What happens in the scenario of a consumer having an old iOS device sitting around, they forget the passcode, but now can't reset it using iTunes?

pilif 8y ago
As far as I understand, there's still the hardware key combination to put the device into DFU mode. In that mode it can still be connected to and a new firmware can be written, but no access to the data is possible. So in order to un-brick an old device sitting around, you put it into DFU mode (the key combination varies from device to device) and restore it that way. Of course you don't ever get your data back, but that's totally the expected behaviour.
- Matt3o12_ 8y ago
  Do you have any source for that information? I am very interested in that as well but couldn't find any information regarding that so far. I have always thought (though without any source) that they re-flashed the iPhone by putting it into the DFU mode (and tricking the iPhone bootloader into accepting their key) and then just brute force the key.
  - ghostly_s 8y ago
    There is no scenario which allows re-flashing a device from DFU while retaining user data. This only appears to work in typical user scenarios because iCloud or iTunes creates a backup from the unencrypted device as a first step before flashing it.
- sdtransier 8y ago
  That makes sense that DFU would still work, since that would let the data continue to be protected and wiped.
zwily 8y ago
I’m guessing you would have to restore the device.
xnyanta 8y ago
The article mentions the ability to disable this feature on "Managed phones" (presumably through and apple configuration profile). To answer your scenario though, you can always reboot a "locked-down" iPhone into Recovery mode or DFU mode and wipe the device without being able to recover the data.

pilif 8y ago

As far as I understand, there's still the hardware key combination to put the device into DFU mode. In that mode it can still be connected to and a new firmware can be written, but no access to the data is possible. So in order to un-brick an old device sitting around, you put it into DFU mode (the key combination varies from device to device) and restore it that way. Of course you don't ever get your data back, but that's totally the expected behaviour.

Matt3o12_ 8y ago
Do you have any source for that information? I am very interested in that as well but couldn't find any information regarding that so far. I have always thought (though without any source) that they re-flashed the iPhone by putting it into the DFU mode (and tricking the iPhone bootloader into accepting their key) and then just brute force the key.
- ghostly_s 8y ago
  There is no scenario which allows re-flashing a device from DFU while retaining user data. This only appears to work in typical user scenarios because iCloud or iTunes creates a backup from the unencrypted device as a first step before flashing it.
sdtransier 8y ago
That makes sense that DFU would still work, since that would let the data continue to be protected and wiped.

zwily 8y ago

I’m guessing you would have to restore the device.

xnyanta 8y ago

The article mentions the ability to disable this feature on "Managed phones" (presumably through and apple configuration profile). To answer your scenario though, you can always reboot a "locked-down" iPhone into Recovery mode or DFU mode and wipe the device without being able to recover the data.