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 901.59 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: 470206a7da5b043a4c9eb27e46a45c9d1a9cd754.zip.