iOS 10.2.1 (build 14D15) is an official Apple over-the-air update for the iPhone 6, released on 2016-12-20T18:02:32Z. The update package is 60.51 MB. This is a delta (partial) update that requires 10.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bd3cd9e006aba77574a18988a76a6d10dd12d34d.zip.