iPhone 11 Pro · iPhone12,3

iPhone 11 Pro · iOS 17.1.1

21B91Unsigned

Catalog data · Last updated: Oct 24, 2026, 5:08 AM UTC

Restore IPSW for iPhone 11 Pro: iOS 17.1.1, build 21B91.

Firmware information

Version: iOS 17.1.1
Build: 21B91
IPSW: Restore IPSW
Size: 6.95 GB
Release date: Nov 8, 2023, 6:58 PM UTC
File name: iPhone12,3,iPhone12,5_17.1.1_21B91_Restore.ipsw
Download host: updates.cdn-apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostupdates.cdn-apple.comiPhone12,3,iPhone12,5_17.1.1_21B91_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-256d70c4ff6136c01103cbc307e138cbf272755533a3e894e28dd6b0c05c9fded3c

SHA-1abd3484ae6b5af4463cd92c891e9a8f2e7322284

MD579fcba236e44b4860ea7137593961ffe