FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 7b80aa6f6604797ed1ba05bc96230e7556d5299d68fd849c1c315a1065bd3dc8.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: b239008804a1203bc8fe2575194d04cc16ce0400d246a37f86e2344976358e13
SHA-1: 021a4b1b51a64ef273169b8d6fdd95ba8e79fbad
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 Pro iPhone18,1

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