iOS 26.3.1 (23D8133) for iPhone 17

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iPhone 17

✓ This firmware is signed. This means that you can 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 (10 GiB)

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iPhone 17 in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 17.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone18,3_26.3.1_23D8133_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 17 to reboot.

macOS

  1. Plug your iPhone 17 in to your Mac.
  2. Navigate to your iPhone 17 in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone18,3_26.3.1_23D8133_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 17 to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 17 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 iPhone18,3_26.3.1_23D8133_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 17 to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone18,3_26.3.1_23D8133_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: d5cdb6f44819fd1dd51d323d730cffcb4cc245d2. 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 iPhone18,3_26.3.1_23D8133_Restore.ipsw
  3. The output of the command should match the following checksum: d5cdb6f44819fd1dd51d323d730cffcb4cc245d2. 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 iPhone18,3_26.3.1_23D8133_Restore.ipsw
  3. The output of the command should match the following checksum: d5cdb6f44819fd1dd51d323d730cffcb4cc245d2. If it doesn't, you may need to redownload the file.

Checksums

SHA256sume395f64fa5f6f443097944a4905546c2c8610dae570ce04c707bc26c5efdfdb9
MD5sume395f64fa5f6f443097944a4905546c2c8610dae570ce04c707bc26c5efdfdb9
SHA1sumd5cdb6f44819fd1dd51d323d730cffcb4cc245d2
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

This update provides bug fixes for your iPhone

For information on the security content of Apple software updates, please visit this website:

https://support.apple.com/100100

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