FIRMWARE DETAILS

iOS 17.1

Build: 21B80Oct 25, 2023Delta OTA

Stable

View details

Filename: 6918e9685130558d612e98d72b75ddf3ca49f88d.zip
File size: 476.9 MB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: afe9feb56e6d2af755ff16d04771c29498aa703c97fcf7cf4732acb04e8bbf9e
SHA-1: 6ebe1d3b774982bffbb257389e9cd17fc2037b3e
Required starting builds: 21B74
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 15 Plus iPhone15,5

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%3B21B80.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 0c4ce2fa2e67994f9d70a827901c0dd4