iOS 13.4 (build 17E5255a) is an official Apple over-the-air update for the iPhone XS, released on 2020-03-10T17:21:26Z. The update package is 113.16 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: b13c3cb38090ea92713b8036ff9159d548d955c0.zip.