iOS 9.9.11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-02-19T21:14:30Z. The update package is 1.52 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: b4fde0acc42a47c562230405c8950d096ac8f830.zip.