Download and Install iOS 13.3 (17C54) for iPhone 6s+ / IPSW Downloads

✗ 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:

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

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_17C54_Restore.ipsw and press enter.
Wait for the restore to complete, and the iPhone 6s+ to reboot.

Open PowerShell, and navigate to the IPSW file that you downloaded, e.g. cd Downloads
Type Get-FileHash iPhone_5.5_13.3_17C54_Restore.ipsw -Algorithm SHA1
The output of the command should match the following checksum: 029520ef27d4a440a1bd738291a01f06f9b829e7. If it doesn't, you may need to redownload the file.

Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
Type openssl sha1 iPhone_5.5_13.3_17C54_Restore.ipsw
The output of the command should match the following checksum: 029520ef27d4a440a1bd738291a01f06f9b829e7. If it doesn't, you may need to redownload the file.

Open a terminal, and navigate to the IPSW file that you downloaded, e.g. cd ~/Downloads
Type openssl sha1 iPhone_5.5_13.3_17C54_Restore.ipsw
The output of the command should match the following checksum: 029520ef27d4a440a1bd738291a01f06f9b829e7. If it doesn't, you may need to redownload the file.

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

iOS 13.3 includes improvements, bug fixes and additional parental controls for Screen Time.

Screen Time

New parental controls provide more communication limits over who their children can call, FaceTime, or Message
Contact list for children lets parents manage the contacts that appear on their children’s devices

Apple News

New layout for Apple News+ stories from The Wall Street Journal and other leading newspapers
Easily like or dislike stories with a tap

Stocks

Stories from Apple News are now available in Canada in English and French
Continue reading with links to related stories or more stories from the same publication
“Breaking” and “Developing” labels for Top Stories

This update also includes bug fixes and other improvements. This update:

Enables the creation of a new video clip when trimming a video in Photos
Adds support for NFC, USB, and Lightning FIDO2-compliant security keys in Safari
Fixes issues in Mail that may prevent downloading new messages
Addresses an issue that prevented deleting messages in Gmail accounts
Resolves issues that could cause incorrect characters to display in messages and duplication of sent messages in Exchange accounts
Fixes an issue where the cursor may not move after long pressing on the space bar
Addresses an issue that may cause screenshots to appear blurry when sent via Messages
Resolves an issue where cropping or using Markup on screenshots may not save to Photos
Fixes an issue where Voice Memos recordings may not be able to be shared with other audio apps
Addresses an issue where the missed call badge on the Phone app may not clear
Resolves an issue where the Cellular Data setting may incorrectly show as off
Fixes an issue that prevented turning off Dark Mode when Smart Invert was enabled
Addresses an issue where some wireless chargers may charge more slowly than expected

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