iOS 9.9.13.3.1 (build 17D5050a) is an official Apple over-the-air update for the iPhone XS, released on 2020-01-22T18:07:23Z. 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: c8eb0d01462206b03d04013d1b7198640b7cae61.zip.