iPhone 12 · iPhone13,2

iPhone 12 · iOS 17.2.1

21C66Unsigned

Catalog data · Last updated: Oct 23, 2026, 10:07 PM UTC

Restore IPSW for iPhone 12: iOS 17.2.1, build 21C66.

Firmware information

Version: iOS 17.2.1
Build: 21C66
IPSW: Restore IPSW
Size: 7.29 GB
Release date: Dec 19, 2023, 7:27 PM UTC
File name: iPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone13,2,iPhone13,3_17.2.1_21C66_Restore.ipsw

Back up before you restore. A restore can erase the data on the device. The identifier has to match, and a file you can download may still be rejected for restore.

Checksum

SHA-256b3ddf66aa83335df5aa5b1ef5d9a209fa50812c65ae173adc6e1630c8a0dc48d

SHA-1ea4463525e056c1c4d5ddd92f4fd2d1a71f96d2d

MD57d14cc55d3d9248d115d826392ebe76e