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FIRMWARE DETAILS

iOS 17.4.1

Build: 21E236Mar 21, 2024Delta OTA
Stable

View details

Filename
b4795da47c12bce466fe5bdbfd14203a3338d89d.zip
File size
4.43 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
fd6fe24d7c7ca0c9e86044aabe0249c85ec66cd41e6938223a80251a1325eca4
SHA-1
bee34d1d3364b215c6303ed2724a6fc74d788980
Required starting builds
19B74
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