iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 6s, released on 2017-01-23T18:08:36Z. The update package is 68.74 MB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 174f4bd362df129b623b0ecaa1270c14f5caac2c.zip.