Download iOS 8.1.3 (12B466) 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 iPhone7,2
iOS Version 8.1.3
Release Date 2015-01-27
Update Date 2015-01-19
Sha1sum
98778339fc7ed47dd1796343e83b00c4317ff923
Sha256sum
df7079a2766bef4a79b90d7b6ab15fb4e074b14dc65a04ca3a609c4f78087d26
md5sum
53c886187b9a218902d478e71ba608d5
Size 1.75 GB
FileName
iPhone7,2_8.1.3_12B466_Restore.ipsw
Status

Download IPSW (1.75GB) Check device info
Release Notes

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

This release includes bug fixes, increased stability and performance improvements, including:

For information on the security content of this update, please visit this website:

http://support.apple.com/kb/HT1222