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FIRMWARE DETAILS

iOS 17.7

Build: 21H16Sep 16, 2024Delta OTA
Release CandidateStable

View details

Filename
e3c81a9f72dd3b49c596674b24147cd3853d127f.zip
File size
2.26 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
675d0fcbe2d9d2026dc5dca68381e04dc5ef1519c926dfc6ef964bed2e0ccb5f
SHA-1
4813e37acd240a63c990c105984c8f01d0398591
Required starting builds
21A340, 21A350, 21A351
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 15 iPhone15,4
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