iOS 12.4 (build 16G5077a) is an official Apple over-the-air update for the iPhone 6, released on 2019-07-16T17:39:39Z. The update package is 125.69 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: 6fcd16f00143fa5c69480e26474110c8c7a09cd3.zip.