iOS 9.9.11.3 (build 15E5178f) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-02-06T18:21:25Z. The update package is 1.82 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: 16f48e7e7a3a06f8dbbba5a030687231a4750cdc.zip.