iOS 9.9.11.3.1 (build 15E6302) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-04-24T17:04:16Z. 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: 6314131c281751e1dcacb78027042a3eea7dfda6.zip.