iOS 12.4 (build 16G5069a) is an official Apple over-the-air update for the iPhone 6, released on 2019-07-09T17:16:26Z. The update package is 294.46 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: 57ad5709df0f3a4599a166aa59b257c62c5daaf1.zip.