iOS 13.3 (build 17C5053a) is an official Apple over-the-air update for the iPhone XS Max, released on 2019-12-05T21:11:30Z. The update package is 856.12 MB. This is a delta (partial) update that requires 13.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 5d5302b38bde64bb1c152eb8fe937e4434c99871.zip.