iOS 9.9.11.1 (build 15B5086a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-10-16T17:04:14Z. The update package is 1.78 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: efcdc8ec29080ee1b05be08a49f43119ec811f43.zip.