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 iPhone7,1
iOS Version 8.1.2
Release Date 2014-12-09
Update Date 2014-12-05
Sha1sum
5d32ad1aec247a84823d258299205af8aa743eb9
Sha256sum
1f113661d2229ffcfa9fe872de4322717249deadb2fddc568b891f6bfe8aced9
md5sum
a1aaaf03f77213e03573e89c48b0a5fa
Size 2.05 GB
FileName
iPhone7,1_8.1.2_12B440_Restore.ipsw
Status

Download IPSW (2.05GB) 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