iOS 4.0.1 (8A306) for iPhone 3G[S]

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iPhone 3G[S]

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

Your download should begin shortly. If it does not, you can download it directly here:

Download (378 MiB)

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

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iPhone 3G[S] in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 3G[S].
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone2,1_4.0.1_8A306_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 3G[S] to reboot.

macOS

  1. Plug your iPhone 3G[S] in to your Mac.
  2. Navigate to your iPhone 3G[S] in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone2,1_4.0.1_8A306_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 3G[S] to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 3G[S] in to your PC.
  3. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  4. To perform a full erase restore, type idevicerestore -e iPhone2,1_4.0.1_8A306_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 3G[S] to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone2,1_4.0.1_8A306_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: c2b6fb9a158547ce726baa1bf8f0558a71518fec. If it doesn't, you may need to redownload the file.

macOS

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 iPhone2,1_4.0.1_8A306_Restore.ipsw
  3. The output of the command should match the following checksum: c2b6fb9a158547ce726baa1bf8f0558a71518fec. If it doesn't, you may need to redownload the file.

Linux

  1. Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
  2. Type openssl sha1 iPhone2,1_4.0.1_8A306_Restore.ipsw
  3. The output of the command should match the following checksum: c2b6fb9a158547ce726baa1bf8f0558a71518fec. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum38b0efbc21063588156ed555c12bba46aee2795781b3269a952fd456009526f8
MD5sum38b0efbc21063588156ed555c12bba46aee2795781b3269a952fd456009526f8
SHA1sumc2b6fb9a158547ce726baa1bf8f0558a71518fec
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 4.0.1 Software Update for iPhone

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

• Improves the formula to determine how many bars of signal strength to display

Products compatible with this software update:

• iPhone 3G

• iPhone 3GS

• iPhone 4

For feature descriptions and complete instructions, see the user guides for iPhone at:

http://support.apple.com/manuals/iphone

For more information about iPhone, go to:

http://www.apple.com/iphone

To troubleshoot your iPhone, or to view additional support information go to:

http://www.apple.com/support/iphone

This update contains security content originally included in previous iOS Updates. For more information, please visit this website:

http://support.apple.com/kb/HT1222

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