FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 5a30fa850692796c6f0fa19f33a2a113cdf355d9a844c0aed9f45e65a0369328.aea
File size: 1.41 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: 81ace6ebcc8456d494d27feaadd36663c88fb624bc54f12233e9875b9d4193d5
SHA-1: cf536b945732816c375a2a0872ed33be88d46e94
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 17e iPhone18,5

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