iOS 8.4.1 (build 12H321) is an official Apple over-the-air update for the iPhone 6, released on 2015-08-13T18:05:15Z. The update package is 1.39 GB. This is a delta (partial) update that requires null already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 40897dd60e5f4912155e1ef14aa8b3451a7fe51a.zip.