FIRMWARE DETAILS

iOS 17.1

Build: 21B80Oct 25, 2023Delta OTA

Stable

View details

Filename: eb321c2c81b5e41a54e44ce74567803ced750658.zip
File size: 473.4 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: 711ca3dc83b1206ef77b0dbe07e0e0f09e688ca592189bfb59d63acef317da40
SHA-1: ee9a64aac5348b3978dd17f178c1e15a13b0f941
Required starting builds: 21B77
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 Pro iPhone16,1

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%3B21B80.json ↗

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