FIRMWARE DETAILS

iOS 17.7

Build: 21H16Sep 16, 2024Delta OTA

Release CandidateStable

View details

Filename: a685ab4b23d2f6bd4129ad045c43b409ea79671a.zip
File size: 4.41 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: 4d929e0530b128e18cc925bdb0fcbaef981f3a213133f778f1eb1e6d8551c7c1
SHA-1: 3edf2c9d4b7dea90612e0d6fc1de7484bc129a91
Required starting builds: 19F77, 19G71, 19G82
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