iOS 9.9.12.1.2 (build 16D5024a) is an official Apple over-the-air update for the iPhone 5s (GSM), released on 2018-12-10T18:09:09Z. 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: 42208d2b2af5c8d9c4dd883baf46a0d398370148.zip.