iOS 9.9.12.3 (build 16F5117h) is an official Apple over-the-air update for the iPhone 6s, released on 2019-03-27T17:06:26Z. The update package is 2.18 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: 7e45112ae3db6407cba2f454c2d4468d50b3d481.zip.