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iPhone 3G

iPhoneOS 3.1 (7C144) for iPhone 3G

✗ This firmware is not signed. This means you cannot restore to it in iTunes.

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✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your iPhone 3G in to your PC.
  3. Open iTunes, and navigate to your iPhone 3G.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone1,2_3.1_7C144_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 3G to reboot.

macOS

  1. Plug your iPhone 3G in to your Mac.
  2. Navigate to your iPhone 3G in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone1,2_3.1_7C144_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 3G to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 3G 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 iPhone1,2_3.1_7C144_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 3G to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone1,2_3.1_7C144_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 9b3b3c148170b012012278efda9ff5c38282d559. 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 iPhone1,2_3.1_7C144_Restore.ipsw
  3. The output of the command should match the following checksum: 9b3b3c148170b012012278efda9ff5c38282d559. 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 iPhone1,2_3.1_7C144_Restore.ipsw
  3. The output of the command should match the following checksum: 9b3b3c148170b012012278efda9ff5c38282d559. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum 2d063a6d34c0c5d694ad834f77281a0fcfa42a2e3d9979c619243583082549bb
MD5sum 52af8da5471daf48532031e751501f03
SHA1sum 9b3b3c148170b012012278efda9ff5c38282d559
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