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FIRMWARE DETAILS

iOS 17.4.1

Build: 21E236Mar 21, 2024Delta OTA
Stable

View details

Filename
279a7cf3fc9feae43a2da7223d29941003c3e161.zip
File size
5.22 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
b07afab8330b8a70fee382e3c327901e9922782ca883b5b2c600099d1abe266d
SHA-1
611c36056222a5450d31558128a5d737f30e9987
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%3B21E236.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 35d6f74f80d62b482e435ab6b7815260