iOS 13.4 (build 17E5241d) is an official Apple over-the-air update for the iPhone 8 Plus (GSM), released on 2020-02-26T18:17:48Z. The update package is 826.21 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: e157b3298dc8014c47eb8d61b26ff39c5f135f16.zip.