iOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPhone 6s+, released on 2019-07-09T17:16:29Z. The update package is 101.38 MB. This is a delta (partial) update that requires 12.4 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 39ae17dcdf9b587809f363c7474e0e8ab57fc2b1.zip.