iOS 26.3.1 (23D8133) for iPhone Air

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iPhone Air

✗ 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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Download (10 GiB)

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 Air in to your PC.
  3. Open Apple Devices, and navigate to your iPhone Air.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone18,4_26.3.1_23D8133_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone Air to reboot.

macOS

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

Linux

  1. Install idevicerestore.
  2. Plug your iPhone Air 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 iPhone18,4_26.3.1_23D8133_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone Air to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone18,4_26.3.1_23D8133_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 5d138a0930f9ead4c45f42c851c5ece479e96830. 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 iPhone18,4_26.3.1_23D8133_Restore.ipsw
  3. The output of the command should match the following checksum: 5d138a0930f9ead4c45f42c851c5ece479e96830. 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 iPhone18,4_26.3.1_23D8133_Restore.ipsw
  3. The output of the command should match the following checksum: 5d138a0930f9ead4c45f42c851c5ece479e96830. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum0f06f20855a0d2452b5ecb1e0186ad539100b3906827cd2888aaa60942e873a3
MD5sum0f06f20855a0d2452b5ecb1e0186ad539100b3906827cd2888aaa60942e873a3
SHA1sum5d138a0930f9ead4c45f42c851c5ece479e96830
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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