iOS 9.9.11.2.5 (build 15D60) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-01-23T18:30:59Z. The update package is 1.42 GB. This is a delta (partial) update that requires 9.3.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: b4d22358b9a6e7c163586d4591b5ee0b41ec54fd.zip.