iOS 8.1.2 (build 12B440) is an official Apple over-the-air update for the iPhone 6, released on 2014-12-09T17:49:05Z. The update package is 64.5 MB. This is a delta (partial) update that requires 8.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 521d91fec5f589cc31b3b82c81a96f59732fe8cc.zip.