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The careful organization of these components ensures that the device not only runs smoothly after an update or restore but also maintains security by verifying the integrity of the firmware files. The inclusion of SHSH blobs, which are required for validating firmware restoration, further demonstrates the controlled environment that Apple ...
UDID is an acronym for Unique Device Identifier. The UDID is a feature of Apple's devices running iOS, tvOS, watchOS, and macOS.It is a unique identifier that is calculated from different hardware values, such as the ECID.
SHSH blobs are created by a hashing formula that has multiple keys, including the device type, the iOS version being signed, and the device's ECID. [5] [non-primary source needed] When Apple wishes to restrict users' ability to restore their devices to a particular iOS version, Apple can refuse to generate this hash during the restore attempt, and the restore will not be successful (or at ...
Some devices include a backup copy of their firmware, stored in fixed ROM or writable non-volatile memory, which is not normally accessible to processes that could corrupt it. Should the firmware become corrupted, the device can copy from the backup memory to its main memory, restoring the firmware.
iTunes is a media player, media library, and mobile device management utility developed by Apple.It is used to purchase, play, download and organize digital multimedia on personal computers running the macOS and Windows operating systems, and can be used to rip songs from CDs as well as playing content from dynamic, smart playlists.
As originally used, firmware contrasted with hardware (the CPU itself) and software (normal instructions executing on a CPU). It was not composed of CPU machine instructions, but of lower-level microcode involved in the implementation of machine instructions. It existed on the boundary between hardware and software; thus the name firmware.
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Not available for download on iPhone X. Fixes an issue on iPhone 8 and iPhone 8 Plus where a crackling sound would occur during a phone call; Fixes an issue where some photos could end up becoming hidden; Fixes an issue where some email attachments would not open; Bug Fixes 11.0.3 [c] 15A432 October 11, 2017 Not available for download on iPhone X