iOS 9.9.12.3.1 (build 16F6203) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2019-05-24T17:04:23Z. The update package is 2.15 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: ba664138fe65d2961d03b1d95f04274a7886f121.zip.