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FIRMWARE DETAILS

iOS 17.2.1

Build: 21C66Dec 19, 2023Restore IPSW
Stable

View details

Filename
iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw
File size
7.82 GB
File type
Restore IPSW
Download host
updates.cdn-apple.com
Link availability
Not verified

Source reports active

Last link check
Not checked
SHA-256
b3ddf66aa83335df5aa5b1ef5d9a209fa50812c65ae173adc6e1630c8a0dc48d
SHA-1
ea4463525e056c1c4d5ddd92f4fd2d1a71f96d2d
Required starting builds
Not reported
Board restrictions
Not reported

Compatible hardware (2)

iPhone 12 iPhone13,2IPSW.me v4 third-party restore observation (retrieval time) · Oct 19, 2026, 10:59 PM UTC
Unknown
iPhone 12 Pro iPhone13,3IPSW.me v4 third-party restore observation (retrieval time) · Oct 19, 2026, 10:59 PM UTC
Unknown

Signing is specific to the device and file. A signed build does not guarantee a downgrade or successful installation.

Source provenance

IPSW.mehttps://api.ipsw.me/v4/device/iPhone13%2C2?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 1fbd93123a0c75915bb60810378c19fc

IPSW.mehttps://api.ipsw.me/v4/device/iPhone13%2C3?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 6877aa2e38b75bbbd7dfc678314a7254

AppleDBhttps://api.appledb.dev/ios/iOS%3B21C66.json ↗

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