iOS 9.9.11.0 (build 15A5370a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-08-31T16:56:15Z. 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: 348d400a9f07e0e185d01ef1a6c1732efa1d8370.zip.