iOS 13.4 (build 17E5255a) is an official Apple over-the-air update for the iPhone XS, released on 2020-03-10T17:21:25Z. The update package is 902.23 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: 23fd720fa42625c3b0e8387798c7ea8c660c87de.zip.