iOS 9.9.10.2.1 (build 14D27) is an official Apple over-the-air update for the iPhone 6s+, released on 2017-01-23T18:08:38Z. The update package is 1.19 GB. This is a delta (partial) update that requires 9.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c451c020a23f2c7f114b8f73f931f226ba520722.zip.