iOS 13.4 (build 17E5249a) is an official Apple over-the-air update for the iPhone 6s+, released on 2020-03-03T18:20:16Z. The update package is 127.4 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: 6cf1ce8d20ee318c41eaaae95a8daa2849c21bc9.zip.