iOS 9.9.15.8.1 (build 19H380) is an official Apple over-the-air update for the iPhone 6s, released on 2024-01-22T18:22:03Z. The update package is 3.81 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: d945ebfbff73f25191c633f2028ec14a8f503345.zip.