FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: d1384a2630ec32b0da9f1dfe06ec6418bbed35bcae8a6928dedb8c960f161fa9.aea
File size: 1.61 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: 01ad318d8a3f279ec113b76676c78cad8c4091671a61e285f94b7ee9bf75b363
SHA-1: 7850f4e93713cbc59e62fa68fb7ccd479a1a8671
Required starting builds: 23E246, 23E254, 23E261
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