iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 6, released on 2017-01-23T18:08:32Z. The update package is 367.86 MB. This is a delta (partial) update that requires 10.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c27c43e7d5bccdcdfb6ee6c3f8ac95cb5ed4c9dc.zip.