FIRMWARE DETAILS
iOS 17.1
Build:
21B74Oct 25, 2023Full OTARelease CandidateStable
View details
- Filename
4986a37e7cdb8267bef6c464cdf82f0b550cff20.zip- File size
- 5.73 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
c3c23b590c12988837bdc4793971d4f7ae7f2108e959ddeea28771217871f41b- SHA-1
89bbd7cb841789a39ad653e294602accf5ba00af- 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 11
UnknowniPhone12,1Signing 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