iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 6, released on 2017-01-23T18:08:31Z. The update package is 1.16 GB. This is a delta (partial) update that requires 9.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: fbec335c99ed7c6ddd3112c1b8f8b18ae591340b.zip.