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FIRMWARE DETAILS

iOS 17.4

Build: 21E219Mar 5, 2024Delta OTA
Stable

View details

Filename
81a8903a86e443213475595347cc085a6bc333e5.zip
File size
1.89 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
0e3eda64b91b40d951932d38fcab08b3d3a5b2f2bc6be9e97a4fe8cc687c52ff
SHA-1
bf0b1633c42197eb79f24af37a85a0d6519bae84
Required starting builds
21A340, 21A351
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%3B21E219.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: c89b542f4c3e0674573e93f3ad0939c2