iOS 13.5 (build 17F5054h) is an official Apple over-the-air update for the iPhone 8 (GSM), released on 2020-04-29T17:07:15Z. The update package is 197.04 MB. This is a delta (partial) update that requires 13.4.5 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 4fc3779844bc95c354c6d3f8ad39e1117b7a326c.zip.