iOS 11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6s, released on 2018-02-19T21:14:27Z. The update package is 155.67 MB. This is a delta (partial) update that requires 11.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 9dc48c75cf6b3a1d1e8e6d6eddc0b2b36d6b682a.zip.