FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 413bcf02da049a36e4ee627edce78df904234fd6c1039c1e2daca4fda29c2076.aea
File size: 4.29 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: e168a02822c2049f12c0b1da2b29c0e93b0610eff20c280e5ce4f9b926470d8e
SHA-1: 275547dabd51eff684f69fa09e5fd79e591e32b6
Required starting builds: 23A330, 23A340, 23A341, 23A345
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 Air iPhone18,4

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