iOS 12.1.2 (build 16C101) is an official Apple over-the-air update for the iPhone XS Max (China), released on 2018-12-17T21:06:19Z. The update package is 499.34 MB. This is a delta (partial) update that requires 12.0 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 7d044ab13e9deabb07246e77c9d34606314c3648.zip.