iOS 9.9.12.3.1 (build 16F6203) is an official Apple over-the-air update for the iPhone XS, released on 2019-05-24T17:04:14Z. The update package is 2.7 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: 748baf5f57041f59bd8ff2e693f76fe06575d163.zip.