firmwarehub.
العربية
FIRMWARE DETAILS

iOS 17.2.1

Build: 21C66Dec 19, 2023Delta OTA
Stable

View details

Filename
ceada7a5fef883bcdd9eea176fb0cdca75e40502.zip
File size
4.78 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
7542eb056eccc6a4c65c7aaab02c5778933a2853c024caf1f56e875140152075
SHA-1
b25614a506000737f7a95adfb1a6960fd1d3ba8e
Required starting builds
19A340, 19A341, 19A345, 19A346, 19A348, 19A404
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