FIRMWARE DETAILS

iOS 17.2.1

Build: 21C66Dec 19, 2023Restore IPSW

Stable

View details

Filename: iPhone15,2_17.2.1_21C66_Restore.ipsw
File size: 7.92 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: 567b36bf273186adcc60f2d2bd464f9e2b8f8661e9a6069ae9aefd24fb301a1f
SHA-1: 930153a2febf291464bf457804808789b3311a70
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 14 Pro iPhone15,2IPSW.me public API retrieval · Oct 21, 2026, 11:35 PM UTC

Unsigned

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/iPhone15%2C2?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 2b06992b3604f5223adde1d01ad93cf1

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

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