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FIRMWARE DETAILS

iOS 17.2.1

Build: 21C66Dec 19, 2023Full OTA
Stable

View details

Filename
bebb562ad02f8085f55005076a523a6b7ec56bff.zip
File size
5.84 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
ebc4dbd3b8cd9ce354b6303987403ce2deff8929e86111b790539e90ea59b20a
SHA-1
e4fd203538f03c76a0e6bf26a826e250b1ec92e9
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 (2)

iPhone 11 Pro iPhone12,3
Unknown
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