FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Restore IPSW

Stable

View details

Filename: iPhone15,4_17.1.1_21B91_Restore.ipsw
File size: 8.02 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: da2a9e331cc10d9cd333cb2511d1d38b68488826171e1c0c4277a6c1f2e37818
SHA-1: 8ff5369d46ea476c82a786ef20c206da23b931e6
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 15 iPhone15,4IPSW.me public API retrieval · Oct 21, 2026, 9:57 AM UTC

Unsigned

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

Source provenance

AppleDBhttps://api.appledb.dev/ios/iOS%3B21B91.json ↗

MIT — copyright 2022 emiyl
Last imported: Oct 19, 2026, 6:28 PM UTC
Record fingerprint: 920b0a70bb6d0ccadee92018f5db3f40

IPSW.mehttps://api.ipsw.me/v4/device/iPhone15%2C4?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: d584b48fac4c7cfb2a6f4e2800846124