FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Full OTA

Stable

View details

Filename: 18557971eeb48f0536708903e73da87707979b8a.zip
File size: 6.21 GB
File type: Full OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: 319b645ec55c4cc1378c3cbe5afa1fd7ef2d4aa03b9e249bcc5cce0b9bb18f26
SHA-1: 00eab2abad200c3cd16069d7dcac2d7af1e27f4a
Required starting builds: Not reported
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 14 Plus iPhone14,8

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%3B21B91.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 920b0a70bb6d0ccadee92018f5db3f40