iOS 11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-02-19T21:14:35Z. The update package is 1.18 GB. This is a delta (partial) update that requires 10.3.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: c614334ee309c1271f9213be43c1c3d4a35e1152.zip.