iOS 10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-01-23T18:08:39Z. The update package is 346.9 MB. This is a delta (partial) update that requires 10.1.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 1bd12b01d1321fed59d6fe13fdc31d135fc2f856.zip.