iOS 9.9.13.3.1 (build 17D5044a) is an official Apple over-the-air update for the iPhone XS Max, released on 2020-01-14T18:21:06Z. The update package is 3.68 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: 646e1a50e6c2cec76317e77d8e64bf1775b8055a.zip.