iPhone 15 · iPhone15,4

iPhone 15 · iOS 17.5

21F79Unsigned

Catalog data · Last updated: Oct 23, 2026, 9:53 PM UTC

Restore IPSW for iPhone 15: iOS 17.5, build 21F79.

Firmware information

Version: iOS 17.5
Build: 21F79
IPSW: Restore IPSW
Size: 7.53 GB
Release date: May 13, 2024, 6:05 PM UTC
File name: iPhone15,4_17.5_21F79_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone15,4_17.5_21F79_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-256071facee10a2aea6946429ca2b9ff20ea80e3d7d6b39a4af9c94fcc05a58f8bc

SHA-163991c525267f5adf72e6ebc8be10fe090d856ce

MD52130da19a0586eaae7408c39bf4922b9