Download iOS 12.5.7 (16H81) 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 Signed

Firmware Identifier iPhone7,1
iOS Version 12.5.7
Release Date 2023-01-23
Update Date 2023-01-14
Sha1sum
809fca5595991ea05dd3b9582fcf298c3911021b
Sha256sum
622ca05f996b2f98df7053da6063e4f8bd46b894a82d1bf82ec3402438ef8994
md5sum
9e136e1bec1bff82e16c8797b63ee82d
Size 2.96 GB
FileName
iPhone_5.5_12.5.7_16H81_Restore.ipsw
Status

Download IPSW (2.96GB) Check device info
Release Notes

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

This update provides important security updates 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