Download iOS 9.3.4 (13G35) for iPhone 6+

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 iPhone7,1
iOS Version 9.3.4
Release Date 2016-08-04
Update Date 2016-08-01
Sha1sum
050715cf5a7cd0948cfbd48220437517ceb0b641
Sha256sum
d398b8c1b4a58d787ca922819ad22bd514aaf1c0c7fd696d7a23922f39fe0bf3
md5sum
3353f8da2f197895c0199fd6f1796988
Size 2.08 GB
FileName
iPhone7,1_9.3.4_13G35_Restore.ipsw
Status

Download IPSW (2.08GB) Check device info
Release Notes

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

iOS 9.3.4 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