iOS 9.9.12.1.1 (build 16C6050) is an official Apple over-the-air update for the iPhone 6s, released on 2018-12-05T18:06:44Z. The update package is 2.15 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: 84f670abbb9ca38d4d95e8eb6bf40e6d4438fe31.zip.