FIRMWARE DETAILS

iOS 17.1.1

Build: 21B91Nov 8, 2023Restore IPSW

Stable

View details

Filename: iPhone16,1_17.1.1_21B91_Restore.ipsw
File size: 8.21 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: 3ba9cdb9213e8a46c085f48728967cfc723fdaf7946105d99395cd45972e8fd9
SHA-1: 563b918ea0b4085b7ebf409cd420efc2dd2777ba
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 15 Pro iPhone16,1IPSW.me public API retrieval · Oct 21, 2026, 9:13 AM 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/iPhone16%2C1?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 11228c9987b97b7d56d617a2f66970f0

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

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