FIRMWARE DETAILS

iOS 17.1 beta 3

Build: 21B5066aOct 10, 2023Delta OTA

Beta

View details

Filename: 23b89a92d1178cddf2e323425efaab19523e7fe9.zip
File size: 837.1 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: 9873922a5fde1efeeb5a47d0150cf98a15526fe7a7fce1c4781c298001fddb3b
SHA-1: f457702c4cf620c1e52ca9c4beaae4f93fd7643f
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 11 Pro iPhone12,3

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