iPhone XS · iPhone11,2

iPhone XS · iOS 17.2.1

21C66Unsigned

Catalog data · Last updated: Oct 24, 2026, 2:38 AM UTC

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

Firmware information

Version: iOS 17.2.1
Build: 21C66
IPSW: Restore IPSW
Size: 7.09 GB
Release date: Dec 19, 2023, 7:27 PM UTC
File name: iPhone11,2,iPhone11,4,iPhone11,6_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.comiPhone11,2,iPhone11,4,iPhone11,6_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-256421fb0c427f623eebcc881dc540fdf350a5a477bab7de44cb46e48dbccaaef4c

SHA-1d10a44b5cbef3609331975eee3465ff630f1d7da

MD5a857e38c18a282b7516cec889e538275