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FIRMWARE DETAILS

iOS 17.7

Build: 21H16Sep 16, 2024Delta OTA
Release CandidateStable

View details

Filename
3a77fd86c95f3234a82957b9b0e40e5c48bd5ddd.zip
File size
903.8 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
883b7271c951489a423befa4f0987c39232ee0503171611fb9617ec0a3c5ddc5
SHA-1
0204b4476e588ed3bb13c9fa78403dd301a8279c
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)

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