iOS 13.4 (build 17E5233g) is an official Apple over-the-air update for the iPhone 11 Pro Max, released on 2020-02-19T18:24:54Z. The update package is 887.7 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: d3bf1fa0de2f67e8d5106541578ce22b309dafdd.zip.