iOS 11.2.6 (build 15D100) is an official Apple over-the-air update for the iPhone 6s, released on 2018-02-19T21:14:25Z. The update package is 1.07 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: dce47a171386e6286d2fa786c16cb6bd7a4d6a33.zip.