FIRMWARE DETAILS

iOS 5.1

Build: 9B176Not reportedRestore IPSW

Stable

View details

Filename: iPhone2,1_5.1_9B176_Restore.ipsw
File size: 720.4 MB
File type: Restore IPSW
Download host: secure-appldnld.apple.com
Link availability: Not verified
Source did not report availability
Last link check: Not checked
SHA-256: Not reported
SHA-1: 4182c7ee075a5acbb2595b1cc27fe279e9c343ce
Required starting builds: Not reported
Board restrictions: Not reported

Compatible hardware (1)

iPhone 3GS iPhone2,1IPSW.me public API retrieval · Oct 23, 2026, 1:37 PM 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/iPhone2%2C1?type=ipsw ↗

Public API; no blanket open-data license established
Last imported: Oct 19, 2026, 6:20 PM UTC
Record fingerprint: 8160ffd030c800ef2069f12dbd9bf85a