iOS 13.4 (build 17E5255a) is an official Apple over-the-air update for the iPhone 8 (Global), released on 2020-03-10T17:21:19Z. The update package is 825.42 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: adf219262e8d4e1352660c7e818716b89649dd86.zip.