Download iOS 9.3.5 (13G36) 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 iPhone8,2
iOS Version 9.3.5
Release Date 2016-08-25
Update Date 2016-08-20
Sha1sum
6da881cd07ae325aa996bbaf402d75096c406428
Sha256sum
dc654842e7576cdee1ffdc35f5e3695188940312a5e1a6bdd50722932110ee2d
md5sum
648a9bd193f3d310b9a8700ade0d12c0
Size 2.27 GB
FileName
iPhone8,2_9.3.5_13G36_Restore.ipsw
Status

Download IPSW (2.27GB) Check device info
Release Notes

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

iOS 9.3.5 provides an important security update for your iPhone or iPad and is recommended for all users.

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

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