iOS 9.9.11.4 (build 15F6079) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-05-29T17:12:23Z. The update package is 1.8 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: f6a859665e0c96c27eb1879b48d2f35643b32505.zip.