iOS 13.4.5 (build 17F5034c) is an official Apple over-the-air update for the iPhone XR, released on 2020-03-31T17:20:22Z. The update package is 368.76 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: a2fb0d4cf0f63ecbc51a7dbac271a2732d4a40ca.zip.