iOS 9.9.12.1.4 (build 16D57) is an official Apple over-the-air update for the iPhone XS Max (China), released on 2019-02-07T18:06:42Z. The update package is 2.58 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: 830108a5c2550a16fbbc5f87b41a6d628b2ef90d.zip.