iOS 15.2.1 (19C63) for iPhone 6s

iPhone 6s

✗ 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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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 6s in to your PC.
  3. Open Apple Devices, and navigate to your iPhone 6s.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone_4.7_15.2.1_19C63_Restore.ipsw file that you downloaded.
  6. Wait for the restore to complete, and the iPhone 6s to reboot.

macOS

  1. Plug your iPhone 6s in to your Mac.
  2. Navigate to your iPhone 6s in Finder.
  3. Hold the Option or Alt key on your keyboard, and press "Restore".
  4. Select the iPhone_4.7_15.2.1_19C63_Restore.ipsw file that you downloaded.
  5. Wait for the restore to complete, and the iPhone 6s to reboot.

Linux

  1. Install idevicerestore.
  2. Plug your iPhone 6s 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 iPhone_4.7_15.2.1_19C63_Restore.ipsw and press enter.
  5. Wait for the restore to complete, and the iPhone 6s to reboot.

Windows

  1. Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
  2. Type Get-FileHash iPhone_4.7_15.2.1_19C63_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: af7d38b552dda764d35d6e92885de839ed7bf1fb. 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 iPhone_4.7_15.2.1_19C63_Restore.ipsw
  3. The output of the command should match the following checksum: af7d38b552dda764d35d6e92885de839ed7bf1fb. 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 iPhone_4.7_15.2.1_19C63_Restore.ipsw
  3. The output of the command should match the following checksum: af7d38b552dda764d35d6e92885de839ed7bf1fb. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum89764e31ed76383ef189a09f7cb1e8c572bed931737b99372e1f2a756961cfb5
MD5sum89764e31ed76383ef189a09f7cb1e8c572bed931737b99372e1f2a756961cfb5
SHA1sumaf7d38b552dda764d35d6e92885de839ed7bf1fb
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 15.2.1 contains bug fixes for your iPhone including:

  • Messages may not load photos sent using an iCloud Link

  • Third-party CarPlay apps may not respond to input

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

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

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