Download iOS 8.1.2 (12B440) 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 8.1.2
Release Date 2014-12-09
Update Date 2014-12-05
Sha1sum
b6a9f0bb63e7634e22b7055bf4392826dc7f609e
Sha256sum
370a665790e54e1f6b14ad8021cb5f43e56f30ccb7aaf3145ba0755430d51d10
md5sum
6d69a2e830bca846b81a92b65f0ba8e1
Size 1.75 GB
FileName
iPhone7,2_8.1.2_12B440_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 and addresses a problem where ringtones purchased through the iTunes Store may have been removed from your device. To restore these ringtones, visit itunes.com/restore-tones from your iOS device.

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

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