iOS 9.9.11.0 (build 15A5354b) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-08-14T16:54:16Z. The update package is 1.7 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: 7d3e32dc10b6d09ca0700793619a27cb069aa7f5.zip.