iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-12-17T21:06:31Z. The update package is 1.7 GB. This is a delta (partial) update that requires 10.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: bbb42c8cc6d3ebac4d77baa49a6a524644e3a3b6.zip.