FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: fc6c8c468a932b6a87521e437a287551b5a97a11416e0746821bc3ea3ddfc9ab.aea
File size: 486.5 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: 0d7cc66d737ab0243abebb4a45df2e667c1912203d22846124b0aa1669e2f8d6
SHA-1: 6c0c23af2509ea6af42304a398512a8c35afae33
Required starting builds: 23F75, 23F77
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