iOS 9.9.11.0.1 (build 15A402) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2017-09-26T17:07:20Z. The update package is 1.52 GB. This is a delta (partial) update that requires 8.1.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7012e14fde950fd7b7f71037e5fe9ca78fd92d86.zip.