FIRMWARE DETAILS

iOS 26.1 beta 4

Build: 23B5073aOct 20, 2025Delta OTA

Beta

View details

Filename: ae04082c01f19bbf815c1d8f8c57d41b6624984aae9e14c216e138af3656bad9.aea
File size: 2.21 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: a0f76f0aea79ece13c1fff41fb4a873c713448661f235e27ec12e04fb0505f1e
SHA-1: fa0791bc530721dc351571242ba0ec77263d2c27
Required starting builds: 23B5059e, 23B5064e
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 Air iPhone18,4

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