iOS 12.4 (build 16G5056d) is an official Apple over-the-air update for the iPhone 6+, released on 2019-06-24T17:17:28Z. The update package is 195.25 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: a713ef73bf4ae9ba735cec4c1aef8cccbcf3a9b6.zip.