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iPhone 6s

iOS 13.3.1 (17D50) for iPhone 6s

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

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Download (3.71 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_13.3.1_17D50_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_13.3.1_17D50_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_13.3.1_17D50_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_13.3.1_17D50_Restore.ipsw -Algorithm SHA1
  3. The output of the command should match the following checksum: 90941bd17d68ba09d3719ca96f75c6038ff65c08. 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_13.3.1_17D50_Restore.ipsw
  3. The output of the command should match the following checksum: 90941bd17d68ba09d3719ca96f75c6038ff65c08. 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_13.3.1_17D50_Restore.ipsw
  3. The output of the command should match the following checksum: 90941bd17d68ba09d3719ca96f75c6038ff65c08. If it doesn't, you may need to redownload the file.

Checksums

SHA256sum e31085f1601e0dd9d0dfea6a021407de70f94b904fabaa9f2137a276c63e159c
MD5sum d955380242e4851f35ee6b2197fa1e07
SHA1sum 90941bd17d68ba09d3719ca96f75c6038ff65c08
Please note, the documentation below is supplied from Apple's update servers. We don't modify the contents of this documentation.

iOS 13.3.1 includes bug fixes and improvements. This update:

  • Fixes an issue in Communication Limits that could allow a contact to be added without entering the Screen Time passcode
  • Adds a setting to control the use of location services by the U1 Ultra Wideband chip
  • Addresses an issue that could cause a momentary delay before editing a Deep Fusion photo taken on iPhone 11 or iPhone 11 Pro
  • Resolves an issue with Mail that could cause remote images to load even when the “Load Remote Images” setting is disabled
  • Fixes an issue that could cause multiple undo dialogs to appear in Mail
  • Addresses an issue where FaceTime could use the rear facing ultra-wide camera instead of the wide camera
  • Resolves an issue where push notifications could fail to be delivered over Wi-Fi
  • Addresses a CarPlay issue that could cause distorted sound when making phone calls in certain vehicles
  • Introduces support for Indian English Siri voices for HomePod

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

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

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