Download and Install iPhoneOS 3.1.2 (7D11) for iPhone 3G / IPSW Downloads

iPhoneOS 3.1.2 (7D11) for iPhone 3G

✗ This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore.

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This firmware is not signed. This means you cannot restore to it in Finder, the Apple Devices app, iTunes, or idevicerestore. The instructions below are included for reference only.

Windows

Install the latest version of Apple Devices from the Microsoft Store.
Plug your iPhone 3G in to your PC.
Open Apple Devices, and navigate to your iPhone 3G.
Hold the Shift key on your keyboard, and press "Restore".
Select the iPhone1,2_3.1.2_7D11_Restore.ipsw file that you downloaded.
Wait for the restore to complete, and the iPhone 3G to reboot.

macOS

Plug your iPhone 3G in to your Mac.
Navigate to your iPhone 3G in Finder.
Hold the Option or Alt key on your keyboard, and press "Restore".
Select the iPhone1,2_3.1.2_7D11_Restore.ipsw file that you downloaded.
Wait for the restore to complete, and the iPhone 3G to reboot.

Linux

Install idevicerestore.
Plug your iPhone 3G in to your PC.
Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
To perform a full erase restore, type idevicerestore -e iPhone1,2_3.1.2_7D11_Restore.ipsw and press enter.
Wait for the restore to complete, and the iPhone 3G to reboot.

Windows

Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
Type Get-FileHash iPhone1,2_3.1.2_7D11_Restore.ipsw -Algorithm SHA1
The output of the command should match the following checksum: b1a6ab2771bb5da372ba75a8fa3e1d72b71359d0. If it doesn't, you may need to redownload the file.

macOS

Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
Type openssl sha1 iPhone1,2_3.1.2_7D11_Restore.ipsw
The output of the command should match the following checksum: b1a6ab2771bb5da372ba75a8fa3e1d72b71359d0. If it doesn't, you may need to redownload the file.

Linux

Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
Type openssl sha1 iPhone1,2_3.1.2_7D11_Restore.ipsw
The output of the command should match the following checksum: b1a6ab2771bb5da372ba75a8fa3e1d72b71359d0. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum	`cc0629c118016709228c54c450d86f4d2352377f12ab3da7097f90564916a2e9`
MD5sum	`cc0629c118016709228c54c450d86f4d2352377f12ab3da7097f90564916a2e9`
SHA1sum	`b1a6ab2771bb5da372ba75a8fa3e1d72b71359d0`

Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iPhone OS 3.1.2 Software Update

This update contains bug fixes and improvements, including the following:

• Resolves sporadic issue that may cause iPhone to not

wake from sleep

• Resolves intermittent issue that may interrupt cellular

network services until restart

• Fixes bug that could cause occasional crash during

video streaming

Products compatible with this software update:

• iPhone

• iPhone 3G