iOS 12.3 (build 16F5156a) is an official Apple over-the-air update for the iPhone 6+, released on 2019-05-10T17:09:44Z. The update package is 414.5 MB. This is a delta (partial) update that requires 12.2 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 0f74795d2e2667ef51b55fed232a461224a715e2.zip.