iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 6+, released on 2018-12-17T21:06:40Z. The update package is 1.86 GB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d2291ffcbd3bb7db618d38fb72dbc7a38d0f21ce.zip.