FIRMWARE DETAILS

iOS 26.3.1

Build: 23D8133Mar 4, 2026Delta OTA

Stable

View details

Filename: 42e31585a7798b9b17b996c1b9257c984948a50f.zip
File size: 5.83 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: 2464520061868bd65451bc7c914026afe6d1e4693c62e97b063d0e23dc0728fc
SHA-1: 42e31585a7798b9b17b996c1b9257c984948a50f
Required starting builds: 20G75, 20G81
Board restrictions: Not reported

OTA packages can require an exact starting build and board. A matching hardware identifier alone is not sufficient for installation.

Compatible hardware (1)

iPhone SE (2nd generation) iPhone12,8

Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

AppleDBhttps://api.appledb.dev/ios/iOS%3B23D8133.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:25 PM UTC
Record fingerprint: d48da896f63809bf3a31e9d1728e206a