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FIRMWARE DETAILS

iOS 17.1.2

Build: 21B101Nov 30, 2023Delta OTA
Stable

View details

Filename
442d8f585f17d1c2f18efb340cd576e4a6b3d263.zip
File size
5.17 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
d6ed3b929465d6a837979b390c54b3d7284edebf717b445d152268180ce0dd88
SHA-1
ec5a7f189b59e23c454057f290e8139537fd2d4a
Required starting builds
18G69, 18G82, 18H107, 18H17
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)

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