iPhone 4 (CDMA) · iPhone3,3

iPhone 4 (CDMA) · iOS 5.1

9B176Unsigned

Catalog data · Last updated: Oct 23, 2026, 5:35 AM UTC

Restore IPSW for iPhone 4 (CDMA): 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: iPhone3,3_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.comiPhone3,3_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-110c8f960e2f2b2c2bc29a49ccc8d020710cde3df

MD5304a0863e83aff0f88215e3f6a193002