iOS 9.9.11.2.5 (build 15D60) is an official Apple over-the-air update for the iPhone 6s, released on 2018-01-23T18:30:41Z. The update package is 1.39 GB. This is a delta (partial) update that requires 9.0.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d7061a0574faa096a41b94a95374b5722a86911b.zip.