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FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Full OTA
Stable

View details

Filename
b1b64fc4b4215478a609599333e809b225d898fe.zip
File size
6.48 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
7200519264b741d65c5c99fd5ce65038bd364aad3add99402dcb9695678568ec
SHA-1
b9db343be2b6a958f6abe485ca3c231d08be52b7
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)

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