iOS 13.4 (build 17E5233g) is an official Apple over-the-air update for the iPhone 6s, released on 2020-02-19T18:24:55Z. The update package is 327.71 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: 1f479057d4b02bb9646cbd32061331a00b83b6f7.zip.