iOS 9.9.12.3 (build 16F5117h) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2019-03-27T17:06:24Z. The update package is 2.14 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: 795692a2e1745d70449eb986d9f508018fe98294.zip.