iOS 11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6s, released on 2018-02-19T21:14:23Z. The update package is 1.13 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6a2d7ae4955c694756412a363c76fbb0a8a81bfe.zip.