iOS 9.9.12.1.2 (build 16C6101) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-12-17T21:05:23Z. 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: 2cbc44e146f57c0f01779c1d41185f520fa67845.zip.