FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 0f4f0bbfcc2c246ecbd09303adf795e3d196ff5c7b1867efad30cdbfa17512d7.aea
File size: 3.49 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: dee01c72ae1cf7097df0fb574eae06c035e1b16e0e685a9efaba533a696bde09
SHA-1: fe724ca195a396f7159ea8d58ebe4cacc85ea09e
Required starting builds: 23B82, 23B85
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 17 iPhone18,3

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, 6:25 PM UTC
Record fingerprint: 5c942573abf0119b4e5bd563e9638914