iOS 9.9.12.1 (build 16B5077c) is an official Apple over-the-air update for the iPhone XS Max, released on 2018-10-09T17:05:45Z. The update package is 2.57 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: 9966d4951769401fb0c68f698a318aef6674e4ff.zip.