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 (3.9 GB)✗ This firmware is not signed. This means you cannot restore to it in iTunes. The instructions below are included for reference only.
Windows
- Install the latest version of iTunes from the Microsoft Store.
- Plug your iPhone 6s+ in to your PC.
- Open iTunes, and navigate to your iPhone 6s+.
- Hold the Shift key on your keyboard, and press "Restore".
- Select the
iPhone_5.5_13.3.1_17D50_Restore.ipswfile that you downloaded. - Wait for the restore to complete, and the iPhone 6s+ to reboot.
macOS
- Plug your iPhone 6s+ in to your Mac.
- Navigate to your iPhone 6s+ in Finder.
- Hold the Option or Alt key on your keyboard, and press "Restore".
- Select the
iPhone_5.5_13.3.1_17D50_Restore.ipswfile that you downloaded. - Wait for the restore to complete, and the iPhone 6s+ to reboot.
Linux
- Install idevicerestore.
- Plug your iPhone 6s+ in to your PC.
- Open a terminal, and navigate to the IPSW file that you downloaded, e.g.
cd ~/Downloads - To perform a full erase restore, type
idevicerestore -e iPhone_5.5_13.3.1_17D50_Restore.ipswand press enter. - Wait for the restore to complete, and the iPhone 6s+ to reboot.
Windows
- Open PowerShell, and navigate to the IPSW file that you downloaded, e.g.
cd Downloads - Type
Get-FileHash iPhone_5.5_13.3.1_17D50_Restore.ipsw -Algorithm SHA1 - The output of the command should match the following checksum:
56ac1fb10f896629d605e628341e654388ce49e2. If it doesn't, you may need to redownload the file.
macOS
- Open a terminal, and navigate to the IPSW file that you downloaded, e.g.
cd ~/Downloads - Type
openssl sha1 iPhone_5.5_13.3.1_17D50_Restore.ipsw - The output of the command should match the following checksum:
56ac1fb10f896629d605e628341e654388ce49e2. If it doesn't, you may need to redownload the file.
Linux
- Open a terminal, and navigate to the IPSW file that you downloaded, e.g.
cd ~/Downloads - Type
openssl sha1 iPhone_5.5_13.3.1_17D50_Restore.ipsw - The output of the command should match the following checksum:
56ac1fb10f896629d605e628341e654388ce49e2. If it doesn't, you may need to redownload the file.
Checksums
| SHA256sum | 3577c1be4d4f3b13e8a503103d982855a8f335ac63ab0ff1a40aea6ec9531c1b |
|---|---|
| MD5sum | dce58c37f1356a489e63c0c35e4061e5 |
| SHA1sum | 56ac1fb10f896629d605e628341e654388ce49e2 |
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: