Apple iPhone 4 (GSM) iOS 4.3.1 firmware
Apple iPhone 4 (GSM)
Not signed
iOS 4.3.1
Build 8G4 For iPhone3,1, n90ap
Global · IPSW
A newer version is available for this region: iOS 7.1.2
Apple no longer signs this version, so a normal restore with Finder or iTunes will fail. Use a signed version unless you know you need this one.
Download
666 MB
Downloads from secure-appldnld.apple.com.
File details
- Device
- Apple iPhone 4 (GSM)
- OS
- iOS 4.3.1
- Region
- Global
- Type
- IPSW
- Released
- Size
- 666 MB
- File name
iPhone3,1_4.3.1_8G4_Restore.ipsw- MD5
32f9a71430c4dd025adab3b73d4a5242- SHA-1
25b6235a35f8d0d41bcf8750193f8b43ceff1ca1
After downloading, compare the checksum with the one above. If they differ, the file is incomplete — download it again.
Before you download
- Make sure your device’s model number is one of: iPhone3,1, n90ap. You will find it in Settings → About phone, or on the box.
- This file is for the Global region. Installing another region’s firmware can remove features or block updates.
- Apple devices can only restore versions marked “Signed”.
- Back up your photos, contacts and files first, and charge the battery above 50%.
How to install
Use Finder on a Mac or the Apple Devices app / iTunes on Windows to install an IPSW file. Apple only accepts versions it is still signing, so check the “Signed” label before you download.
Read the guide: How to restore an iPhone, iPad or iPod with an IPSW file