FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Full OTA

Stable

View details

Filename: 5207106d2cee52fa12a8204f17370d46caa6ed13.zip
File size: 5.73 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: 0dd7216f1aff5908bba97a888311f5d7b1fecdae0426d571ad126102a3d0f3ef
SHA-1: 19df6e8b881fa6a9a7b5cc8ad7717efd24728283
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 11 iPhone12,1

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%3B21B91.json ↗

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