FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: e0e13647b9584dee497849e29562b4bf55e18b9a99bc445ecc6e694403d42cf9.aea
File size: 3.02 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: ad364a917036622c366613722318b814c052dc98132012810e1782b03d63164b
SHA-1: 9dea15c05f076d190fd15b7637920a55d382014b
Required starting builds: 23D8128, 23D8133
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