iOS 9.9.12.1.4 (build 16D57) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-02-07T18:06:44Z. The update package is 2.29 GB. This is a full OTA update that can be applied from any compatible base version. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 12697d9849eb2e3f50a43c23b6305d617efe7403.zip.