iOS 11.2.5 (build 15D60) is an official Apple over-the-air update for the iPhone 6s, released on 2018-01-23T18:30:52Z. The update package is 446.95 MB. This is a delta (partial) update that requires 11.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 6dfc9a90d35954e21fd218183fbfaa2b2eb3fddd.zip.