Download iOS 13.5.1 (17F80) 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 13.5.1
Release Date 2020-06-01
Update Date 2020-05-28
Sha1sum
6b6d13128fcbd0229ae7bd9c4e618bd82c4609ef
Sha256sum
7464365921c5ce0c3a12c5b31a9b6be8fb060de58ddb2921f2d38bcfdb90e17b
md5sum
661c6c001868f4fe7bf0b838c25b6967
Size 3.52 GB
FileName
iPhone_4.7_13.5.1_17F80_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 13.5.1 provides important security updates and is recommended for all users.

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