FIRMWARE DETAILS

iOS 17.4.1

Build: 21E236Mar 21, 2024Delta OTA

Stable

View details

Filename: 3db064e2508501ee7f06f4d86da6cf5c51198c6a.zip
File size: 3.41 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: 40c76067d77c6174de02044ba1e1c620da451b9c36b578444918d13ef276a59e
SHA-1: cad67dd8aba58e4631ab0076a84e8c088f12c9e3
Required starting builds: 20F66, 20F75
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)

iPhone 11 Pro iPhone12,3

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