FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 0de3ff6d1a0cfe10f912c1db5c5a13d73d2f030ebcad175ee9e573aa71b8d38c.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: 1cb2c8eb9685c09d3f855ddde36a97ddcd3bb63a02854f3f7986a3d235eafe36
SHA-1: ddca0cea768b05c70504167dbca1b4e7b7e634b3
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 Pro Max iPhone18,2

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