iOS 9.9.15.4 (build 19E241) is an official Apple over-the-air update for the iPhone 6s+, released on 2022-03-14T17:14:24Z. The update package is 3.94 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: 9c2a81df6c2050d563de8347c6f26217aafa4a39.zip.