iOS 13.4 (build 17E5223h) is an official Apple over-the-air update for the iPhone 11, released on 2020-02-05T18:17:31Z. The update package is 828.41 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: f14cf646e9e89b33648f09b4d595649e906a380d.zip.