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FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Full OTA
Stable

View details

Filename
eeb18017dbedf31d1071d4f25624720d4b010ef0.zip
File size
5.86 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
b365fcd67bccaedce11390c768c4069c97e9194d496a5caf3579aac2d94c0810
SHA-1
b899f1aa0cb5329f2891e0f0e7a7aa5679ff4685
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 (2)

iPhone 11 Pro iPhone12,3
Unknown
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