iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone 6+, released on 2019-07-16T17:39:37Z. The update package is 296.5 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: 647d0ed5e1d2aca1e3724a48a97006fa5949c61d.zip.