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FIRMWARE DETAILS

iOS 17.1

Build: 21B74Oct 25, 2023Full OTA
Release CandidateStable

View details

Filename
e8315887ae477b86c4f214f1c59f0860fb867ea0.zip
File size
6.14 GB
File type
Full OTA
Download host
updates.cdn-apple.com
Link availability
Not verified

Source reports active

Last link check
Not checked
SHA-256
22821e2916d867209af09d026c6a94c9935f3a5ed631a292594fa5ebb48bd63b
SHA-1
e7419724fea42d7c3d723c0a830e307192b497b5
Required starting builds
Not reported
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 13 iPhone14,5
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%3B21B74.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: ce1037df7218db6f4121eac6e89afc29

AppleDBhttps://api.appledb.dev/ios/iOS%3B21B74-RC.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 596792c64544009bb3cdf2ce13596537