iOS 9.9.15.8.4 (build 19H390) is an official Apple over-the-air update for the iPhone 6s, released on 2025-03-31T17:31:09Z. The update package is 3.82 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: fe13fd445142d84b44d89532abd5509e023e7074.zip.