FIRMWARE DETAILS

iOS 26.5.1

Build: 23F81Jun 1, 2026Delta OTA

Stable

View details

Filename: 4fa222385e82b2e06fbf868928ed5e1f1e889f3dca605cb3e2a9f0a33913f700.aea
File size: 4.50 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: e732fa8cfe012b49bd190a7f616e3b92e218037ead61b339d8483d84e9d4e468
SHA-1: 695e97650d78208d0ea907cb7b40cce1c7965ada
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 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