FIRMWARE DETAILS
iOS 17.7
Build:
21H16Sep 16, 2024Delta OTARelease CandidateStable
View details
- Filename
d5b4b40d5aaceb5acba2adff944dc4ce2449680b.zip- File size
- 1.99 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
0849a7f0488359c5da93c41a3cb0d450934d287dfaba41b760c67dc4d65ccbe5- SHA-1
a68cd907c5e8d0cd1a024a0e55617dcaa03bf31b- Required starting builds
21B101, 21B74, 21B91- 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 XS
UnknowniPhone11,2Signing 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