iOS 26.3.1 (23D8133) for iPhone 15

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iPhone 15

✓ 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 (9.4 GiB)

Windows

  1. Install the latest version of Apple Devices from the Microsoft Store.
  2. Plug your iPhone 15 in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 15.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone15,4_26.3.1_23D8133_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 15 to reboot.

macOS

  1. Plug your iPhone 15 in to your Mac.
  2. Navigate to your iPhone 15 in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone15,4_26.3.1_23D8133_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 15 to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 15 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 iPhone15,4_26.3.1_23D8133_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 15 to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone15,4_26.3.1_23D8133_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 20fded225621d86086c747676b0944b27963898b. 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 iPhone15,4_26.3.1_23D8133_Restore.ipsw
  3. The output of the command should match the following checksum: 20fded225621d86086c747676b0944b27963898b. 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 iPhone15,4_26.3.1_23D8133_Restore.ipsw
  3. The output of the command should match the following checksum: 20fded225621d86086c747676b0944b27963898b. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum864eab98814d3031fd7261383c2c6711b558a168984d26b370e1071cad163f1d
MD5sum864eab98814d3031fd7261383c2c6711b558a168984d26b370e1071cad163f1d
SHA1sum20fded225621d86086c747676b0944b27963898b
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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