iOS 9.9.12.0 (build 16A6366) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-09-12T19:04:10Z. The update package is 2.11 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: 041f64887d222e5cbcd42c22c076d2682b18184f.zip.