iPhone 3GS · iPhone2,1

iPhone 3GS · iOS 4.3.1

8G4Unsigned

Catalog data · Last updated: Oct 22, 2026, 4:30 AM UTC

Restore IPSW for iPhone 3GS: iOS 4.3.1, build 8G4.

Firmware information

Version: iOS 4.3.1
Build: 8G4
IPSW: Restore IPSW
Size: 0.41 GB
Release date: Not available
File name: iPhone2,1_4.3.1_8G4_Restore.ipsw
Download host: secure-appldnld.apple.com

IPSW download

Check the model and signing status before downloading.

Download IPSW

Download hostsecure-appldnld.apple.comiPhone2,1_4.3.1_8G4_Restore.ipsw

The catalog marks this build as unsigned. A normal restore may not be accepted.

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-2564492b1a28b3e60ee2f230cb11eeae2fa9fea9ebfde26d600cc6425e1bcf3e609

SHA-16de986f2dbd16a65db122e7c54a70f31812d028a

MD5694c93b5b608513136ba8956dff28ba7