iPhone 4 (GSM) · iPhone3,1

iPhone 4 (GSM) · iOS 5.1

9B176Unsigned

Catalog data · Last updated: Oct 23, 2026, 1:36 PM UTC

Restore IPSW for iPhone 4 (GSM): iOS 5.1, build 9B176.

Firmware information

Version: iOS 5.1
Build: 9B176
IPSW: Restore IPSW
Size: 0.77 GB
Release date: Not available
File name: iPhone3,1_5.1_9B176_Restore.ipsw
Download host: secure-appldnld.apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostsecure-appldnld.apple.comiPhone3,1_5.1_9B176_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-1ed0ffe5ad5e63fe3a977a1ffe49bedbe2dcffd89

MD5706b8987b37bc99e349197ecc5e26c3b