iOS 9.9.15.3 (build 19D6050) is an official Apple over-the-air update for the iPhone 6s, released on 2022-01-26T18:14:14Z. The update package is 3.83 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: 872fb1e499424590985783dca81850b8d4c8a425.zip.