FIRMWARE DETAILS

iOS 17.1 beta 3

Build: 21B5066aOct 10, 2023Delta OTA

Beta

View details

Filename: f8cc64ad35f0cc770813f73b56ac231e796c50ab.zip
File size: 828.8 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: d82e9b9b1a040bcdde15d1fa42cb83557104508a6223001556a2b4ae412746f9
SHA-1: 2ef28c887a7c216e7ed8480d68cb02aea7f6314a
Required starting builds: 21A5326a
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 XS iPhone11,2

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%3B21B5066a.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: b73e131c06b516a6126e8e74a8094a4c