FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Full OTA

Stable

View details

Filename: bfb49e5fcc4b61b440ba3736082b9c52396870d0.zip
File size: 5.71 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: df61844a19ae79a1052b44e85c26617a47b26d3b6e9d91bdc4d724db16f9f213
SHA-1: 8bb969dc382f906322a82e3a52fac53ce2afd00a
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 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%3B21B91.json ↗

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