iOS 11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-02-19T21:14:38Z. The update package is 155.88 MB. This is a delta (partial) update that requires 11.2.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 8539a4ca5c0596ef90335988738dc1cadc3d1542.zip.