iOS 13.4.5 (build 17F5044d) is an official Apple over-the-air update for the iPhone 11 Pro Max, released on 2020-04-15T17:15:48Z. The update package is 182.37 MB. This is a delta (partial) update that requires 13.4.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 23cd4a095774fdeeceaae9cc50ff02c4c463d888.zip.