FIRMWARE DETAILS

iOS 26.1 beta 4

Build: 23B5073aOct 20, 2025Delta OTA

Beta

View details

Filename: 56541e2ce678ac04fb9317f6e77075bfdce6c4fd3ebaed310544ee23303ea325.aea
File size: 2.11 GB
File type: Delta OTA
Download host: updates.cdn-apple.com
Link availability: Not verified
Source reports active
Last link check: Not checked
SHA-256: 15cb884624c911033a46b8bcb04af44f0dbbc0001681d42464efb52e9be1e7b8
SHA-1: 270cb13a11934fcf25a8a8f8fe7ad74dce6438da
Required starting builds: 23A5336a
Board restrictions: Not reported

OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.

iPhone 16 Plus iPhone17,4

Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:26 PM UTC
Record fingerprint: 18d16b0fe5b5f30c945b62b572d3ecde