FIRMWARE DETAILS

iOS 17.7

Build: 21H16Sep 16, 2024Delta OTA

Release CandidateStable

View details

Filename: 3371e2d94f9e4e2c16ebb7fcd7852cf50423827a.zip
File size: 780.7 MB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: fc51c31ea0568e2c63eab16b6080e51ffe7d510afe1cfa6dfe41bed1069099b4
SHA-1: 933ab7313ea79a32171cf3e351c3c1737e982e2f
Required starting builds: 21F101, 21F79, 21F90
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%3B21H16-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:27 PM UTC
Record fingerprint: c8b3b02ce4311c79f2853199085cf330

AppleDBhttps://api.appledb.dev/ios/iOS%3B21H16.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:27 PM UTC
Record fingerprint: ae79657c71a1de572003507c6b1f785c