iOS 11.2.5 (build 15D60) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-01-23T18:31:09Z. The update package is 155.93 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: 67728cb730cd6b557d571c718e7d2bd1f19b416f.zip.