iOS 12.4 (build 16G5027i) is an official Apple over-the-air update for the iPhone 6, released on 2019-05-20T17:07:24Z. The update package is 208.63 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: c358b581092a15559bff42f11294bda43a2e6a0d.zip.