iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 6s, released on 2017-01-12T21:12:02Z. The update package is 30.89 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: f6a9e8f2cde73f7f577d14b8fe5a715e98a9398c.zip.