iOS 12.3 (build 16F5129d) is an official Apple over-the-air update for the iPhone 6+, released on 2019-04-08T17:05:09Z. The update package is 310.48 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: b92f6769b1c4cb5d22308517062c01c2fd5bbe0f.zip.