FIRMWARE DETAILS
iOS 17.1
Build:
21B74Oct 25, 2023Full OTARelease CandidateStable
View details
- Filename
94ef086744b658c33e97e6acb3618f9c26f72c14.zip- File size
- 5.99 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
d79099f526ea41be474f2ef79cab3b0d683a660859d093665a62a5e80e187d4d- SHA-1
389a92c92aa22913e5244cef8195d53986c6128d- 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 (3)
iPhone XS
UnknowniPhone11,2iPhone XS Max
UnknowniPhone11,6iPhone XS Max (China mainland)
UnknowniPhone11,4Signing 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