iOS 12.4 (build 16G5046d) is an official Apple over-the-air update for the iPhone 6+, released on 2019-06-11T17:07:41Z. The update package is 288.59 MB. This is a delta (partial) update that requires 12.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: faf69def34b77b50389928051a8b2a15a1882585.zip.