Download iOS 13.5 (17F75) for iPhone 6s

You will have to note that you can only restore signed IPSW firmware files using iTunes or 3utools.

❌ This IPSW firmware is not being Signed by Apple

Firmware Identifier iPhone8,1
iOS Version 13.5
Release Date 2020-05-20
Update Date 2020-05-14
Sha1sum
cabb226d470f1dae58184d13f67b1ea2d080cf6b
Sha256sum
5db4f03f55c3f112e8a071d7896811a2ac46e1bbb0c89b09390eb5031572f29a
md5sum
e99643d2f6e77c4089e85162ee0c552a
Size 3.52 GB
FileName
iPhone_4.7_13.5_17F75_Restore.ipsw
Status

Download IPSW (3.52GB) Check device info
Release Notes

It should be noted that these are the official release notes for the from Apple

iOS 13.5 speeds up access to the passcode field on devices with Face ID when you are wearing a face mask and introduces the Exposure Notification API to support COVID-19 contact tracing apps from public health authorities. This update also introduces an option to control automatic prominence of video tiles on Group FaceTime calls and includes bug fixes and other improvements.

Face ID and Passcode

Exposure Notification

FaceTime

Emergency Services

This update also includes bug fixes and other improvements.

Some features may not be available for all regions or on all Apple devices. For information on the security content of Apple software updates, please visit this website: https://support.apple.com/kb/HT201222