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iPhone 6s

iOS 11.2.1 (15C153) for iPhone 6s

✗ This firmware is not signed. This means you cannot restore to it in iTunes.

Your download should begin shortly. If it does not, you can download it directly here:

Download (2.66 GB)

✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.

Windows

  1. Install the latest version of iTunes from the Microsoft Store.
  2. Plug your iPhone 6s in to your PC.
  3. Open iTunes, and navigate to your iPhone 6s.
  4. Hold the Shift key on your keyboard, and press "Restore".
  5. Select the iPhone_4.7_11.2.1_15C153_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_11.2.1_15C153_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_11.2.1_15C153_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_11.2.1_15C153_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 202b14e1e0f2cdbffc9a08c3aff9a75a4d9c1eee. 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_11.2.1_15C153_Restore.ipsw
  3. The output of the command should match the following checksum: 202b14e1e0f2cdbffc9a08c3aff9a75a4d9c1eee. 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_11.2.1_15C153_Restore.ipsw
  3. The output of the command should match the following checksum: 202b14e1e0f2cdbffc9a08c3aff9a75a4d9c1eee. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum a50333cdc2199845c9e4ccc080bc68c0f30a5b22cc87ff30765d2594781e7cb7
MD5sum d2ad5a1613a62b5170615d97d3de29b2
SHA1sum 202b14e1e0f2cdbffc9a08c3aff9a75a4d9c1eee
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 11.2.1 fixes bugs including an issue that could disable remote access to shared users of the Home app.

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

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

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