FIRMWARE DETAILS

iOS 17.5

Build: 21F79May 13, 2024Delta OTA

Release CandidateStable

View details

Filename: 8f1d2a6d96641186e273b7320b879acbaf4104c2.zip
File size: 4.43 GB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: 125cfb36b1265bb735327624b9e7c0b5e7fda1fd6a968d9609a059a503902589
SHA-1: a966fc7bc5fb532c1a47c5aefaf0315b317fa67c
Required starting builds: 19B74
Board restrictions: Not reported

OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.

Compatible hardware (1)

iPhone SE (2nd generation) iPhone12,8

Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

AppleDBhttps://api.appledb.dev/ios/iOS%3B21F79.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: fad1f444ed45a9b0b4e75442c2a737cc

AppleDBhttps://api.appledb.dev/ios/iOS%3B21F79-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 2cce62a34025b5a2ae1d1605ae45809f