FIRMWARE DETAILS

iOS 17.1 beta 3

Build: 21B5066aOct 10, 2023Delta OTA

Beta

View details

Filename: 37cf0e5cbeb30c85f885bf00c648ba390a012b69.zip
File size: 635.6 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: cf9ed3071f79e3898c70736ce2796abaf5837d50e94fd2a1b068215c8d3b3972
SHA-1: cd0b55f84816e39b94a1d2e4560d50ef541ca7b2
Required starting builds: 21B5056e
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 12 Pro iPhone13,3

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