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FIRMWARE DETAILS

iOS 17.2.1

Build: 21C66Dec 19, 2023Full OTA
Stable

View details

Filename
b83c64a79005e9094f8bbe0127f964b8ae4832dd.zip
File size
6.24 GB
File type
Full OTA
Download host
updates.cdn-apple.com
Link availability
Not verified

Source reports active

Last link check
Not checked
SHA-256
76bdd69f749956e8ff50263c32082d238f9e53b1385032449b84e4f0936e1e9c
SHA-1
1ba402a771da053cf5a705feb400b69b4bec0772
Required starting builds
Not reported
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%3B21C66.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: d446c7f095cdf40f999162af3ba1751c