FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 9da6db2708a103aa3616fa5c460b018bc5e5513bb57d4b938727ae3e7e68b301.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: 523ab2eb6095ca0303117e209b7cb6ccf541ad49175a0d1b636d93a8932c2be5
SHA-1: 30f2a52fc305872c4cc785bfdd1c689c9a0ad7b7
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 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