iOS 9.9.15.8.1 (build 19H6380) is an official Apple over-the-air update for the iPhone 6s+, released on 2024-01-22T18:20:29Z. The update package is 3.95 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: f152bb4f82f04830586593e5e85991985a6f6e04.zip.