iOS 9.9.11.4 (build 15F79) is an official Apple over-the-air update for the iPhone 6s+, released on 2018-05-29T17:16:35Z. The update package is 1.6 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: 5803792ce390cfb55b25d71c7f90d535fa2fb11f.zip.