iOS 15.3.1 (19D52) for iPhone 11 Pro Max

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iPhone 11 Pro Max

✗ 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 (7.0 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 11 Pro Max in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 11 Pro Max.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 11 Pro Max to reboot.

macOS

  1. Plug your iPhone 11 Pro Max in to your Mac.
  2. Navigate to your iPhone 11 Pro Max in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 11 Pro Max to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 11 Pro Max 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 iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 11 Pro Max to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: ae8469c2f4ecc6e825a5ab9368d843469524be21. 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 iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw
  3. The output of the command should match the following checksum: ae8469c2f4ecc6e825a5ab9368d843469524be21. 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 iPhone11,2,iPhone11,4,iPhone11,6,iPhone12,3,iPhone12,5_15.3.1_19D52_Restore.ipsw
  3. The output of the command should match the following checksum: ae8469c2f4ecc6e825a5ab9368d843469524be21. If it doesn't, you may need to redownload the file.

Checksums

SHA256sumc69c2d6200198229f371dc0cf49b9aff914a49d35bbc5bb9baff2b42555e09b7
MD5sumc69c2d6200198229f371dc0cf49b9aff914a49d35bbc5bb9baff2b42555e09b7
SHA1sumae8469c2f4ecc6e825a5ab9368d843469524be21
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 15.3.1 provides important security updates for your iPhone and fixes an issue that may cause Braille displays to stop responding.

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

https://support.apple.com/kb/HT201222

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