FIRMWARE DETAILS

iOS 17.1.2

Build: 21B101Nov 30, 2023Delta OTA

Stable

View details

Filename: f4cdc873f7f9769637d8787fd7012f03d5c0991a.zip
File size: 3.71 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: e65701867b6a71a99a30929f67970205c4830873e514a0e2cd1a78fe70e8261f
SHA-1: fb32f5c3e1e20ebfb0239c8d1c3ed2b273b44a9e
Required starting builds: 20A362, 20A380, 20A392
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 iPhone11,2

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