FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: f923f63b0182d3b88bc812c2315f18cb7e8191a4a3466547b2762098f036227d.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: 21892e6a084bf7714533be5d72aa4b171e9dd5db04a99dab2563fbae7f596690
SHA-1: 648534298adec3c377e1c3a5ce9b503374e8e5f8
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 iPhone18,3

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