firmwarehub.
العربية
FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Delta OTA
Stable

View details

Filename
e52623c8bd3ecd485cbc147e2c2132209ec55ec0.zip
File size
5.18 GB
File type
Delta OTA
Download host
updates.cdn-apple.com
Link availability
Not verified

Source reports active

Last link check
Not checked
SHA-256
4d3fc27d26ac3402b06b12cb2a56ce207686072a83695e4b70aa977779d75705
SHA-1
00aa83bbbbe342af81e83aa1b87eab03525beaf6
Required starting builds
18E198, 18E199, 18E212, 18F72
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