iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone 5s (Global), released on 2018-12-17T21:06:34Z. The update package is 1.32 GB. This is a delta (partial) update that requires 11.2.6 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: d0d279a8cf1c1de8f4fe9323a8a589ae9db82471.zip.