iOS 13.4 (build 17E5233g) is an official Apple over-the-air update for the iPhone XS Max, released on 2020-02-19T18:24:50Z. The update package is 886.94 MB. This is a delta (partial) update that requires 13.3.1 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 035e844cfd05343ba379d3298f92e06eda3fd10b.zip.