FIRMWARE DETAILS

iOS 17.1.2

Build: 21B101Nov 30, 2023Delta OTA

Stable

View details

Filename: f11524cf0478f49b30f7391a11583375a0ff0e6f.zip
File size: 3.69 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: 5308366f760d2363c78ae4d817a0b8b4848e302b0df1f055aee5ab171790fa25
SHA-1: 783afba73ddf39b685d3c3a7fe689960f7d4f46f
Required starting builds: 20C65, 20D47, 20D67
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 XS Max iPhone11,6

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%3B21B101.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 4f30a5cce34598c7be862eafa91e271b