iOS 13.4 (build 17E5241d) is an official Apple over-the-air update for the iPhone XS Max, released on 2020-02-26T18:17:51Z. The update package is 320 MB. This is a delta (partial) update that requires 13.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 34ec9b726b6a9a781948d4fd75c9031f654216cb.zip.